Look at Keys.c and ask yourself how many times the on_cud is starting a new instance of that function. In one second it could fire 60 instances.
Simply use a time to limit it to once every 1/2 a second.
Look at examples from the past in the forum about keys and time limit. --Hint combo keys post.
Look at proc_kill.
As a final step some one will most likely fix it minutes for money.