The official UBI site is down more times than I can count, perhaps that is what is going on right now?
Also, as I stated before, your Instashield.exe might be corrupt as well, perhaps you need to download and install a fresh copy of it. I know I did that once with a game and I think it was a UBI game as well.
Did you try any of the other links I posted? all and all, we are just trying to help but if you don't tell us what is going on and just give us general answers, we can't help as best as you would want us to do so.