Invalid volume license key

Recently decided to use my old server (Dell, Xeon processor) as a regular work station, PC. The hard drive has been formatted, deleted and loaded with a W7 Pro (enterprise), everything seems to be ok but at the time to try to activate the license through my license server this is the message I'm getting:

The software licensing service reported that the computer could not be activated with a volume license product key. Volume licensed systems require upgrading from qualified operating system. Error 0x004F035.

Also, no way to join domain !!!!!

Any ideas, thanks in advance

George

Ok this is what I just got from MGADiag, unfortunately the COA sticker is gone, this is a kind of old server, Dell PowerEdge T100 server, on the other hand DocBrown is right, this type of W7 products are just to be activated through the licensing server, on the network.

Diagnostic Report (1.9.0027.0):
-----------------------------------------
Windows Validation Data-->
Validation Code: 0
Cached Online Validation Code: N/A, hr = 0xc004f012
Windows Product Key: *****-*****-J8D7P-XQJJ2-GPDD4
Windows Product Key Hash: xgsndMkYdJsYmUng0qIJ/thx+HI=
Windows Product ID: 00371-868-0000007-85034
Windows Product ID Type: 1
Windows License Type: KMS Client
Windows OS version: 6.1.7600.2.00010100.0.0.048
ID: {06CBDC1D-1D6D-42AE-9A47-40C1AA9FFFC3}(3)
Is Admin: Yes
TestCab: 0x0
LegitcheckControl ActiveX: N/A, hr = 0x80070002
Signed By: N/A, hr = 0x80070002
Product Name: Windows 7 Professional
Architecture: 0x00000009
Build lab: 7600.win7_rtm.090713-1255
TTS Error:
Validation Diagnostic:
Resolution Status: N/A
Vista WgaER Data-->
ThreatID(s): N/A, hr = 0x80070002
Version: N/A, hr = 0x80070002
Windows XP Notifications Data-->
Cached Result: N/A, hr = 0x80070002
File Exists: No
Version: N/A, hr = 0x80070002
WgaTray.exe Signed By: N/A, hr = 0x80070002
WgaLogon.dll Signed By: N/A, hr = 0x80070002
OGA Notifications Data-->
Cached Result: N/A, hr = 0x80070002
Version: N/A, hr = 0x80070002
OGAExec.exe Signed By: N/A, hr = 0x80070002
OGAAddin.dll Signed By: N/A, hr = 0x80070002
OGA Data-->
Office Status: 109 N/A
OGA Version: N/A, 0x80070002
Signed By: N/A, hr = 0x80070002
Office Diagnostics: 025D1FF3-364-80041010_025D1FF3-229-80041010_025D1FF3-230-1_025D1FF3-517-80040154_025D1FF3-237-80040154_025D1FF3-238-2_025D1FF3-244-80070002_025D1FF3-258-3
Browser Data-->
Proxy settings: N/A
User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Win32)
Default Browser: C:\Program Files (x86)\Internet Explorer\iexplore.exe
Download signed ActiveX controls: Prompt
Download unsigned ActiveX controls: Disabled
Run ActiveX controls and plug-ins: Allowed
Initialize and script ActiveX controls not marked as safe: Disabled
Allow scripting of Internet Explorer Webbrowser control: Disabled
Active scripting: Allowed
Script ActiveX controls marked as safe for scripting: Allowed
File Scan Data-->
File Mismatch: C:\Windows\system32\wat\watadminsvc.exe[Hr = 0x80070003]
File Mismatch: C:\Windows\system32\wat\npwatweb.dll[Hr = 0x80070003]
File Mismatch: C:\Windows\system32\wat\watux.exe[Hr = 0x80070003]
File Mismatch: C:\Windows\system32\wat\watweb.dll[Hr = 0x80070003]
Other data-->
Office Details: <GenuineResults><MachineData><UGUID>{06CBDC1D-1D6D-42AE-9A47-40C1AA9FFFC3}</UGUID><Version>1.9.0027.0</Version><OS>6.1.7600.2.00010100.0.0.048</OS><Architecture>x64</Architecture><PKey>*****-*****-*****-*****-GPDD4</PKey><PID>00371-868-0000007-85034</PID><PIDType>1</PIDType><SID>S-1-5-21-116965401-4227717659-2833011038</SID><SYSTEM><Manufacturer>Dell Inc.</Manufacturer><Model>PowerEdge T100</Model></SYSTEM><BIOS><Manufacturer>Dell Inc.</Manufacturer><Version>1.1.2</Version><SMBIOSVersion major="2" minor="5"/><Date>20081015000000.000000+000</Date></BIOS><HWID>E1BB3607018400F8</HWID><UserLCID>0409</UserLCID><SystemLCID>0409</SystemLCID><TimeZone>US Mountain Standard Time(GMT-07:00)</TimeZone><iJoin>0</iJoin><SBID><stat>3</stat><msppid></msppid><name></name><model></model></SBID><OEM><OEMID>DELL </OEMID><OEMTableID>PE_SC3 </OEMTableID></OEM><GANotification/></MachineData><Software><Office><Result>109</Result><Products/><Applications/></Office></Software></GenuineResults>
Spsys.log Content: 0x80070002
Licensing Data-->
Software licensing service version: 6.1.7600.16385
Name: Windows(R) 7, Professional edition
Description: Windows Operating System - Windows(R) 7, VOLUME_KMSCLIENT channel
Activation ID: b92e9980-b9d5-4821-9c94-140f632f6312
Application ID: 55c92734-d682-4d71-983e-d6ec3f16059f
Extended PID: 00371-00170-868-000000-03-1033-7600.0000-1422012
Installation ID: 014112721961644704444670584282164645019212731365935882
Partial Product Key: GPDD4
License Status: Initial grace period
Time remaining: 33120 minute(s) (23 day(s))
Remaining Windows rearm count: 3
Trusted time: 5/28/2012 2:50:09 PM
Please use slmgr.vbs /ato to activate and update KMS client information in order to update values.
Windows Activation Technologies-->
HrOffline: 0x00000000
HrOnline: N/A
HealthStatus: 0x0000000000000000
Event Time Stamp: N/A
ActiveX: Not Registered - 0x80040154
Admin Service: Not Registered - 0x80040154
HealthStatus Bitmask Output:

HWID Data-->
HWID Hash Current: KgAAAAEAAgABAAEAAAAAAAAAAQABAAEA6GFOMu5UZP4gbizJnjyOi0bK
OEM Activation 1.0 Data-->
N/A
OEM Activation 2.0 Data-->
BIOS valid for OA 2.0: no, invalid SLIC table
Windows marker version: N/A
OEMID and OEMTableID Consistent: N/A
BIOS Information:
ACPI Table Name OEMID Value OEMTableID Value
APIC DELL PE_SC3
FACP DELL PE_SC3
HPET DELL PE_SC3
MCFG DELL PE_SC3
SPCR DELL PE_SC3
SLIC DELL PE_SC3
ERST DELL PE_SC3
HEST DELL PE_SC3
BERT DELL PE_SC3
EINJ DELL PE_SC3
TCPA DELL PE_SC3

Once again thanks for your help !!!!!

So... Basically there is no way to go through this, if I'm not wrong this is a kind of lock that can be removed, my copy of W7 is valid (legal) there is nothing I can do?? Our agreement with Microsoft is only for this type (KMS) licenses.

Thanks