TWEE_Upgrade-UnregPatch.exe ERROR!!!

[l30z1nh0w]

Please help me.
I downloaded the TWEE_Upgrade-UnregPatch.exe and moved it to where the TWEE_Upgrade.exe file is.
Then it starts to copy an modified version of the file, but in the end of the process I always get this error:

TWEE_Upgrade-Unregistered.tmp
0x00000002 (2)
The system cannot find the specified file.

Then I press "Ok", hoping its going to work, but it doesn't.
It asks me to register my game before applying the patch, and my game isn't registered. I've tried many times and nothing...

Thanks in Advance
Leonardo
(I'm sorry if I posted this Thread in the wrong place, I'm really desesperated)