I had a similar problem with a mic and headset (see my posting at click here). As you can see the only way that I have been able to make it work is unplugging the speakers and plugging in the headphones and mic! Unfortunately this is a bit of a chore to say the least!
I am by no means an expert in these matters (really a complete novice!), but from what I have read I think that the answer is that with 6 speakers (as you say two in each hole) the mic line-in magically becomes a line-out for the speakers!
I may be barking up completely the wrong tree here, but eould a USB mic be better?
"AS you say I`m no expert either But I think that that what you say is the only way forward."
stutrav, I don't mind receiving e-mails (goodness knows I get enough each day!), and it clearly wasn't anything to really add to the thread, but it is probably better posting messages like your last in the thread, so others can see what's going on, even if it is no progress! This also has the added advantage of bumping your problem back up towards the top of the page!