Network Problems...

As the title says, I am having a few problems with setting up a network account so I can access the internet on my PSP.

I have created a network account before, but a mate of mine deleted it as a joke, I have tried to create a new account many times after this incident but a problem stops me from doing this every time...

I go into network settings etc etc etc and set up an account with my philips router, yet when it comes to testing the connection, my psp freezes up and shuts down. This happens everytime and I wondered if anyone else was having the same problems as me and if they could give me any advice.