Hello, I am new to this forum so i shall introduce myself

( excuse me on any bad grammer due to english being my 3rd lanuage) My name is Mohammad Taki from Lebanon.
My problem is connecting PSP to the internet ( not even sure that i'm posting in right category), I have researched almost evrey possible answer on the web and on forums but none seem to answer my problem. I even tried the official PSP message boards
I have a Zhone 6218-I2-320
ADSL2+ 4 Port WiFi Bridge/Router, I have one desktop and a laptop and they are all work great with my wireless dsl connection. ( Extra info : My desktop is connected with a wireless maxG adapter and my Laptop via built in wifi )
From what i understood PSP is wireless B ( However the documentation of the router said it supports G and B ) so theoreticly no problem should exist.
My connection is currently WPA-psk secured( i have tried wep and no security , still no luck with psp connection ) I also made sure no mac filtering is enabled ... still no luck !!!
How is it that only my PSP cannot connect to the network ... it gives me this annoying messege all the time
"A connection to the access point could not be stablished. Check the security settings for the network and try again. "
What is really driving me

crazy is that security settings are fine... firewall not blocking anything, mac filtering disabled and I entered the wpa key ( more than 50 times , i even removed security and disabled wep for a bit ... and still no luck )
I know this was a long post and thank you if you took the time to read till here.. please post your help if you wish

I called my ISP, the place i got the router and almost anyone who knows anything about computer !!! and no one could help .... thanks in advance