If you are trying to mine bitcoins: dude, what do you expect! A single block reward is 25 BTC, worth over 2000. You think you will just somehow magically earn that kind of money by leaving your PC on for a few nights? Wake up 
Forget about mining bitcoins, just buy them. It's faster, easier, cheaper, and better for the environment
And preferably use a different exchange than MtGox (nothing particularly wrong with MtGox but others are cheaper, faster, and more diversity and competition is better for the Bitcoinomy).
Forget about mining bitcoins, just buy them. It's faster, easier, cheaper, and better for the environment
And preferably use a different exchange than MtGox (nothing particularly wrong with MtGox but others are cheaper, faster, and more diversity and competition is better for the Bitcoinomy).
Right
And a Bitcoin client will make no bitcoin, just keep them in safe