why don't some VST plugins not work ?

[Buteskin]

I was trying the free reverb plugin shown in the URL below, but I can't select it.

I have other VST plugins that do work..

http://www.synthedit.com/vst.htm

[Buteskin]

Ha, i got the plugin working !

here is the trick.

put the plugin in a directory where others plugins work !