I just tried on o2 Ireland and it didn't work.

I sent myself a picture from another phone and I got the notification of a received message but no message appeared in fMMS

Then I tried to send a message and I got something like Error 110 Connection Timeout

I closed and restarted fMMS and I could see a message in the main window. It connected to GPRS straight away but then nothing else happened and fMMS froze. I couldn't open the settings or exit the app without killing it

The Access Point settings I'm using are

Access Point Name : wap.dol.ie
Username : user
Password: user
Proxy: None \ Don't use
IP Address: auto

MMSC: http://mmsc.mms.o2.ie:8002

could this be related to