1-Unistall the game..
2-Delete all files.
3-Check the registery.
4-Install again.
If it didn't work.
1-Re-format computer(download a new windows)
2-Download Direct x 8 or more..
3-delete the crossfire setup and download a new one using a diffrent mirror.
Didn't work?
Download using a diffrent site.
Didn't work?
Your computer is fucked man!
This usually happens when servers are full or down for Crossfire - You may want to try again now. If it still does not work please follow the advice above and perform a clean installation.