gate and side chain THE SAME?

You need at short decay time on your reverb and a long pre-delay.

sorry, pre-delay time on the reverb...

Aprrox 50-100ms depending on tempo (for the pre delay)

Yeah, essentially you need to set the pre delay to time with the offbeat.
Reverse reverb however is a different effect and probably not what you are looking for.

Indeed.

so i added (to my kick) a decay of 2.1 sec anda predelay of 180 ms sounds good..does that mean its reverse reverb or do i gotta now REVERSE the sample?

here..

Go and read this my friend

http://www.harmony-central.com/Effects/Articles/Reverb/

thanks....looks good..do u thinku can make a quick loop of a kick with examples of reverse reverb or gated reverb..etc jsut to show us all what we are supposed to hear whne we do the technique right...its ok if not..jstu curious thanks...u been very helpful