Windows 7 - Mapped Drives Not Accessible

I am unable to edit any files on my mapped drives. I have several directories on C that I have made network shares. I have then mapped the shares to D and E on the same local computer that shares reside.

I can edit the files in their original direstories on C. I can also edit these files if I access them through the network share "Network\laptop\Projects". But, when I map this location to D: I am no longer allowed to edit the files or create new files from the new D: drive. The map looks fine and I can see all of my files. I use the following command:

net use d: "\\Vaio-Z10\C\Office Files\Projects" /Persistent:Yes

In frustation, I provided share access to EVERYONE, Full Control, and Security access to EVERYONE, Full Control. I even made sure that I took ownership of all files and directories in the directories that I am accessing. I took ownership with the network login account that I log into the laptop with (DOMAIN\Tom). I consistently get the following error message when I try to create a new directory through the D drive:

"You need permission to perform that action."

If I try to rename a file from the D drive i get the following error message:

"You need permission to perform that action. You need permission from DOMAIN\Tom to make changes to that file.

Well I AM user DOMAIN/Tom. I logged into the laptop as DOMAIN/Tom. DOMAIN\Tom has full share and security access to the files, and DOMAIN\Tom is the owner of all the files. What the hell else does Microsoft want from me.

I have done this many times on other computers without any problems. We even have standard scripts that we use to do this, but for some reason on this one machine I am getting this problem. I have to have this directory structure under D: because programs that we use, look for a consistent directory drive letter and naming convention to work across all computers in the office.

Any help would really be appreciated.

I am using Windows 7 Pro 64bit on a vaio with 512 gig drive (half full) and 8 gig of ram.

As an update to my previous post, I have found out that if I use the Tools/Map Network Drive/ command from the toolbar then I can get access to my files correctly, but if I use the "net use" command in a batch file then I dont have any write or modify access to the files.

We use the "net use" command on all of our other computers and is works fine. I am not sure why it wont work on this one. I need to the the net use command because i am constantly moving the directories that D through H are pointing to and I dont want to have to manually do it through the menu bar each time.