Operation flashpoint problem (a new one)

[Roughneck Ace]

I had a cracked operation flashpoint, and used the ultimate cracked patch on it.
But know I have the original game from the store...but that one won't start up.....it shows the screen to check for the cd ...but it doesn't start afterwards.
But when I put the crack on it...it works again...
could this be caused by remaining files from the cracked update??
please help....
Cause I hate that fade thingy