Using Group channels in Cubase

[Rekko11]

I'm trying out a production technique whereby I assign drums, bass etc.. to a group channel, and then put a compressor on the group channel.

I have found this is a great way to get more punch/ volume in my mixes.

However, here's the problem:

When I bounce down to a .wav or .mp3 file in Cubase, the resulting audio is the same as if the group channel was muted, in other words it doesn't seem to be including the group channel in the mixdown to .wav using the 'export audio' function...

Anyone else have this prob. What to do??????????????