9900 problem with wifi stopping working
 

Hey, my problem with my Blackberry 9900 is that I can connect to my wifi network and it works for about 2 or 3 pages of web browsing and then it just stops responding.

The 'outgoing arrow' flashes in the top right hand corner as if my blackberry is sending requests to my router but the 'incoming arrow' stops coming up and i get an 'unable to find the requested server.' message. There is no problem with my router etc as my laptop works perfectly over it.

It says that I am still connected to the network when this happens and if I disconnect and then reconnect again it does the same thing over and over.

The internet is fine when I use my 'mobile network' (i'm with O2 in the UK) so it is a wifi problem that just stops working after a couple of minutes.

Thanks in advance for any help or advice.