Question regarding BTC mining

[Dr. Death]

I wanted to ask about how does the webpage register when i earn bitcoins or i dont, i am using MultiBit, wich i used to make a wallet and get the adress, wich i inserted into the Slush pool webpage, and then i login with my worker username and pass to the Slush pool, but after going for some minutes at 300 Mhash i checked back at the slush webpage and find out that not even 0.00000001 bitcoins were added to my account, i'd like to know if that was normal or if i was doing something wrong. after all, i barely started mining BTC a few days ago.


I am using GUIMiner, if it is important.

[coinprize]

1. Read the FAQ in the registered pool.
2. If you can't settle the problem,
    change another pool.
   
   Lots of pools are waiting for you.   

[Gabi]

You receive something only when the pool find a block, so of course if you mine for some minutes you will see 0, check again once it find a block, you should have something.

Note that mining with 300mh/s is just lost time and lost power these days

[Dr. Death]

You receive something only when the pool find a block, so of course if you mine for some minutes you will see 0, check again once it find a block, you should have something.

Note that mining with 300mh/s is just lost time and lost power these days

but before i was minning at 2.5 mhash with CPU (i was getting 300 with GPU) and it got like 1 block for every 30 minutes or so, so, if i mine with ATI, how much time should i wait?