Command prompt won't work...

Hey, new to the forum so yeah, I appreciate the help!

Thing is for some reason when I try to access the command prompt(through Start -> Run -> cmd)

It is popping up with a message in the command prompt box itself saying

"The command prompt has been disabled by your administrator.

Press any key to continue."

And then a key follows it with it closing. I am the administrator (I'm the only account in XP...)

So yeah, can anyone please help me out so I can access this and get rid of this message. Once again I would really appreciate it, thanks!

Start | Run | Type (or Copy and Paste) the following...

REG add HKCU\Software\Policies\Microsoft\Windows\System /v DisableCMD /t REG_DWORD /d 0 /f