AlterIW Exe not Working

HEy MPGH Users!
I´ve got a problem ...
I copied my MW2 directory and installed the alterIW Client Update, renamed me
in Config and started the game, but always a Windows pops up which says iw4mp is not working and the game closes.
Any Solution ?

A picture would be helpfull...

then log out of steam and then log back in

/problem fixed

I would re-install it and see if that fixes it.