[pluggo] Problem with Pluggo

Hi there Im new to using Pluggo and this forum, so far Pluggo looks great, however the problem that Im having is trying to get any sounds out of the plugins that come with it. My set up is that Im using Pro Tools le 7.3 on a black Macbook. The plugins open up no probs in Pro Tools but Im getting no sound. Im using a Axiom 25 midi keyboard to trigger sounds. Any suggestions? Thanks in advance..
K.