Hello majidhirad, welcome.
Give this a shot, the xlive.dll actually comes in the 'Games for Live' package installer. The download link is below:
http://go.microsoft.com/fwlink/?LinkId=128962
- Download the package
- Right click the package and choose 'Run as Administrator'
- Install the application and restart your computer afterwards
- Try and run the game
Let us know if this works,
Thanks!
Ryan Thieman
Microsoft Answers Support Engineer
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