Ok. Here is what happened with me

First i got the check your APN thing in fMMS so it wouldn't save the settings. so discovered thru frals that I had to add a new APN thru terminal. manually

Get sim_imsi: (Really long number)

Set sim_imsi:

Then a new packet data connection appeared in my Internet Connection. I went there to edit it.

New Internet connection settings:
Access Point Name: du
user: (none for me)
pass: (none for me)

Advanced:
HTTP Proxy: 10.14.18.4
Port: 8080

Then I saved and connected to this connection
Now in fmms

fmms Settings:
APN: du
MMSC: http://mms.du.ae
Resize image width: 400
Phone number: [my #]

I got the error "Unknown name" when I was trying to send an MMS without connecting to the new data connection first. (silly me)

I got the error "Connection Refused" when I had the port set wrong in the proxy.

At the moment, after ironing out the APN settings. It's working. I get 200k success message. And the other mobile receives the MMS. but it says invalid text or attachment.

I've only tried with one Picture (smallest i can find). I'll try others later.