Problem With Zain Network And Phone.

Helo there guys pls i need u al 2 help me on my phone and zain network i cant jst figure out what is rong with d network al d softwares i have been downloading into my nokia 2626 non them worked with zain network on my phone but i can use every other network e.g like mtn, etisalat, and glo al this network support my software and applications but i cant use zain even when my access point is very much correct it cant stil support my phone and software pls i need your assistance pls.