Gsm_Fone

Hello, this is my first post..I have got one Blackberry 8330 from verizon i unlocked it using Cdma workshop.But when i make *228 call, it is disconnecting in two seconds.Any idea what service settings do i need to change such as SID NID etc..,i checked all settings are ok. I set the folllowing channels settings in the handset. REL 239-PA--14655---65535 280-SA 553-PB 594-SB Hope that all the experts dive in to help me.