This is the MMS and Edge settings that Maxis send to me. I had tried out with Swirly MMS, no problem.

EDGE settings

Menu -> Settings -> General -> Network

EDGE - APN: net
Username: maxis
Password: wap

How To Download SwirlyMMS

From iPhone Main Menu > Select Installer

And you will see Categories Menu
 Select Network
 After that select SwirlyMMS and select install
 After successfully install the software, you will see SwirlyMMS icon on the iPhone Main Menu

For MMS setting > Select SwirlyMMS icon
 After select setting
 You need to enter the details as follow:-
 MMSC : http://172.16.74.100:10021/mmsc
 Proxy : 202.075.133.049
 Apn : net or unet
 Username : maxis
 Password : wap
 Select Save to save the setting