HTC Desire - MMS

I have been searching around the Internet on sites such as HTC, o2 and other mobile forums for this issue I have.

The results I have come across have all mentioned about setting up the MMS for o2 and I have found at least 2 different variations for this config.

These I have tried, some do not show the dot that needs to be selected and others that do, on trying them I either get a general network failure or the message just stays in the list with an envelope and a i in a circle.
On looking at the status of this message , it just says pending.

I am also aware of the file size limit of 300k and made sure that the pictures I send are much less than that.
Further to this, no matter what I have tried to do to add the picture, it always get sent as a slideshow.


I can connect to the mobile network with no problems and browse the internet so I know that works

Any thoughts on this?