Thanks for the answer, but...
There were no Garmin folder at c:! I created and pasted the files, but the error persisted!
I tried to paste at MapSource folder, but...error!
My MapSource.exe works instaled at c:/windows/Mapsource. Do I have to reinstal it at the created garmin folder? Maybe i have missed some important instruction during Mapsource installation... i have just run MSmain.msi, accepted the suggested path, and replaced the .exe file for the patched file.
Any other suggestion?