Hello again and many thanx for your answer Rob. Now I will try using Bridge restrict which asks me about the MAC addresses. The only problem is when I use this Bridge Restrict I can use WPA, AES properties. So I can not use a password protected wLan.
Now I have configured it. Another thing confuses me is, Associated and authorized thing. USR5441 says my laptop(writes the MAC address) is Associated but it is not authorized:S Why is that? I think it is the main reason I can not access to the net.
Also another thing

I am sitting on my table, USR5441 is connected to my USR9108 with a cable. I did all you said, no passwords nothing is enabled. Entered the MAC addresses then made a try. Wolla it connected

then I decided to disconnect 5441 and 9108 and removed the cable. guess what...my wireless connection lost
As far as i know and read, I wouldn't need to connect this two devices with a cable.
So now I took my laptop and 5441 went to another room. Plugged it to AC source. Now my laptop is having a limited or no connectivity problem. Plus, i cannot access to 5441 from my pc as i type its ip address

this might give you a clue.
I realize this is an very easy set up but dont know why it made me ill

I can provide you the SS of my settings if it might do. I can take every single SS and send you
thanx again Rob