Can someone help me?  I am relatively new to mining.

I have been mining on Hashcow for the last 2 days and I have set up my receiving btc wallet address (via Electrum)... however I have not been receiving any BTC from hashcow.  My balance remains at 0.00000 BTC, even though hashcow reports that it has "confirm exchanged" more than .001 btc.  I am mining at about 600 kh/s.

What is the problem?  Is there suppose to be a several day delay until payment shows in my BTC wallet?  (I am 100% certain that my receiving address has been correctly entered in Hashcow.  I am using GUIminer to mine).

Any help is appreciated.  Thanks.