Does the address on the website still match the one you provided?
Is your client downloading the most recent blocks?
My address on both my Bitcoin client and in my BTCMine profile have not changed since I started in the pool. I cannot be sure if my client is downloading new block information. When I go to Generate Coins it says not connected, and seems to stay like that as long as I leave it on.
You do not need generate coins option in official client. It's useless for now.
What is the number of blocks and number of connections in your bitcoin client footer?
If client say not connected for a long time, probably you have problem with connect to bitcoin network and should check your network router/firewall/isp blocking.