NFSUnlimited.net

I'm using NFS pro street v.1.0
the game stop working in drag (round 3) ,in drift (round 3 )
and sometimes when the race day begins
it makes me crazy
any solutions please

thanks for the nice post
but i have a big problem
i'm using v.1.0 no cd exe file
and i want to upgrade the game to v.1.1
but
i can't find the original exe file (v.1.0) that is required for the upgrade process
can anyone give it to me