i have a 98 honda prelude type sh.. just recently my car has been having prob. when the engine is cool.. it runs fine but when it gets warmed up.. sometimes when i get stuck in traffic.. my car won't go forward.. the rpm would rise when i step on the gas but the car doesn't want to move.. i told mechanics about the problem, they told me it was the symptoms of the clutch slipping. Since i haven't change my clutch for a couple of yrs. i had the clutch changed but the same problem still exist. Got it diagnose for tranny prob. but they told it wasn't the tranny at all.. He mentioned something about electrical prob. but couldn't pinpoint the exact prob.. can someone tell me what's wrong with it?

thanks jay