IKA: MAJOR LAG IN VISTA

Well I fixed most of the errors I had when trying to play or even make a game in ika, everything seems to run but the games lag on anything major or even as simple as attacking, menu"moving the cursor, selecting etc" the program just freezes and I get"not responding" on the window?

I'm running the latest version of Python, and .Net, Maybe that's the problem?

Edit: Should I Install Windows XP for a duo boot?