I cant get Bots acclaim to start, what am I doing wrong?

I am using a different computer than my older one that I used to play bots on (windows xp), I am using windows Vista now..anyways I downloaded the game but when I double click the blue bots icon it starts to load but stops and says 'C:\programFiles\BOTS/temp/bulinfo.sys' File Creation Failure. WTF does that mean?