XP 2 win 7 problem?

Hello,

I am working together with another person, I have XP, he - win 7. He cannot run the project I sent him. Is there a problem here? Could anybody with win 7 check if it works?

http://www.mediafire.com/?d6gchxm9aa3eeam

Also, what is the best way to exchane stuff when working on the same project but from different OS? What is the easiest workflow?

export the project as package and it will work.

it should also work if you compress the whole project folder (-> assets and library folder) and so far worked without problems between different windows editions and osx