I was using GUIminer...
but when I relaunched it, it said I had no bitcoins..
huh?
since when do miners know, or tell about how many coins we have in our wallets?
check your deepbit-account, it'll tell you how much you earned
and if that amount has been send to your wallet, your bitcoin-client will show,
miners won't do that, they're supposed to generate hashes, nothing more than that.