[{HVY-E}Jinxx]

What do you mean the 'TIR Button won't work'? Are you referring to the F9, F12?

I'm assuming that you already checked the game 'Controls' section to ensure that the F9 and F12 aren't assigned to some other command.
If you are running Windows Vista or Win 7, do the following:

Right click on the Track iR icon.
Select compatibility
Check the 'Run as administrator' box.
Click 'Apply'

Hopefully that will solve the issue for you.

S!