Assassin's Creed II (DVD9 to 1xDVD5) FULL

[kyddos]

tried, and it fitted in dvd5

but there's a problem
when i start the game (which i installed using the repacked dvd) it gives me error saying :
"Unable to find the Ubisoft Game Launcher, please re-install Assassin's Creed 2".

Ubisoft Game Launcher:
Error Code 1.

If i install the game through the first dvd (before the repack)
it works just fine.

any solutions please?

*edit : I've tried reinstalling for countless time