Garageband problem - or maybe it's just me

[ednaplate]

i have an M-Audio Fastrack interface plugged into a macbook pro. The problem I appear to have is that when i plug in my bass and listen through headphones I get the dry, unaffected bass sound and this doesn't change when i select any of the amp effects that are available in GB. I have the input switched to mono and the monitor switched on. Sometimes GB works fine and I can access the effects but 90% of the time it's just the sound of the bass. I hope I'm making myself clear.

[DaveFry]

The " Direct Monitoring " button on the front allows the user to send the input ( your bass ) directly to the outputs ( monitoring ), ie without going through the computer processing and out again . .
Try with the Direct Monitoring button off .