Hello Razvan !
Before trying what i wrote below, follow the instructions from the thread ScarLy pointed.
1st of all update your windows7 (all autoupdates) and find a crack for it :lol:. Also delete those "manele" :nuhnuh:
Then :
1. Right click Main.exe
2. Click Properties
3. Click Compatibility Tab
4. Check the box "Run this program in compatibility mode for:"
5. Choose "Windows XP (Service Pack 3)
Debugger is present, DEP (Data Execution Prevention) is set to all programs and mu client is started with limited user.Close all debuggers before starting client, set DEP for essential windows programs only (system properties > Advance Tab > Performance Setting Button > Data Execution Prevention Tab) and run mu client with admin level (run as Admin in Vista/Win7)
That should fix your problem!
Best regards,
Dreams