Sony Ericsson W660i

Question

I have having problems receiving picture messages on the above phone, I have checked with the network supplier 02 who have twice sent through the information to upload on the phone, this has made no difference. The message comes through but will not open properly and the message says that my mobile doesn't support it. I have also got someone else to send me a picture message and that will not deliver to the phone at all. Any Ideas?