Thanks, but that was not really my point

If I am the only miner in the pool right now, is it almost like i am solo-mining? If the pool will find a block, it was because I mined it? If I mine alone in the pool right now, with the diff set to 10.000, will the pool be able to find a block?
Or am I just sumbitting shares with no chance of having succes? If the pool does not find a block, I won't get any coins at all I guess
Well, the main purpose of a pool is to share luck, more miners join, more chances to get luck (i.e. mine a block). In your case, it's almost no diff from solo mining and that depends a lots on your luck, maybe you mine a block everyday or in a couple of days, at very bad luck it could be a week