Help with the first Nolf!

If anyone knows how to solve the control problem in the NOLF skinte in a personal, The problem is that you have to shoot with the F key, and if you move it to the left mouse button, then nothing will change at all, If anyone has come across a large prozba, discard how to fix it. !! !!

Shl it is about the very first NOLF, it has been patched to 1.004