MMS im3 setting for Palm 750v

I think this did it for me

Setting MMS IM3
Connection Name : M3-MMS
Data Bearer : GPRS
Access Point Name : mms.indosat-m3.net
Username : mms
Password : im3
Authentication : Normal

more on
http://lonerider.wordpress.com/2008/02/01/setting-mms-gprs-part-ii/