Windows 7 - win 7 won't wake up after sleep

I am back with some issues still cropping up. I believe it is still network I/O issues, but can't point to any minidump files. Here's what is happening - waking up from sleep etc. is working well thus far, but frequently I am losing access to my NAS. It is a Lacie Ethernet Big Disk (I believe it has Embedded Windows XP on it). When I try to access the network drive windows explorer hangs. After that everything goes haywire - Outlook won't start. I can't even logoff or shutdown normally - it hangs. I have to do a reboot to get it back up again.

Where should I look for issues? Event error says the following: Critical Error - Event 41, Kernel-Power
Log Name: System
Source: Microsoft-Windows-Kernel-Power
Date: 2/12/2010 5:46:37 AM
Event ID: 41
Task Category: (63)
Level: Critical
Keywords: (2)
User: SYSTEM
Computer: home-kali
Description:
The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Microsoft-Windows-Kernel-Power" Guid="{331C3B3A-2005-44C2-AC5E-77220C37D6B4}" />
<EventID>41</EventID>
<Version>2</Version>
<Level>1</Level>
<Task>63</Task>
<Opcode>0</Opcode>
<Keywords>0x8000000000000002</Keywords>
<TimeCreated SystemTime="2010-02-12T11:46:37.546875000Z" />
<EventRecordID>7735</EventRecordID>
<Correlation />
<Execution ProcessID="4" ThreadID="8" />
<Channel>System</Channel>
<Computer>home-kali</Computer>
<Security UserID="S-1-5-18" />
</System>
<EventData>
<Data Name="BugcheckCode">0</Data>
<Data Name="BugcheckParameter1">0x0</Data>
<Data Name="BugcheckParameter2">0x0</Data>
<Data Name="BugcheckParameter3">0x0</Data>
<Data Name="BugcheckParameter4">0x0</Data>
<Data Name="SleepInProgress">false</Data>
<Data Name="PowerButtonTimestamp">0</Data>
</EventData>
</Event>

Any clues? Thanks!