Nokia 6650 "File format unknown" message on wap sites

Hi there, i have the nokia 6650 on 02 in the UK, i can access many wap
sites, bbc,google etc. but cannot get onto the home page - wap.02.co.uk.

I get "file format unknown, i've tried downloading the settings from Nokia
but still no success. This also appears on other various sites.

Any ideas?

Cheers

dave