prince of persia 2008 install windows 7 Error

Hey guys..
I bought prince of peria 2008 last week. Tried to install it and as soon as i click on the install option, i get an error message.

Error Code: -5001 : 0xffffec75
Error Information:
>SetupNew\setup.cpp (211)
PAPP:Prince of Persia
PVENDOR:Ubisoft (www.ubisoft.com)
PGUID:7C11154F-3539-4CB5-979D-EF7913473E53
$14.0.0.162

The installation wont even start. i have windows 7 build 7600 x64. is my operating system the issue? because one of my friends has vista 32 bit on her pc and it seems to work fine there . I am uncertain whether to dump my os and get back to vista or not. Is there any way to get it working?

awaiting ur reply guys..
cheers!!