When I receive a text on 2 pages, I never receive the second half. How come?

Whenever someone sends me a text in two pages, I never receive the second half. All it says is *missing text* at the end of the first message. Why is that, and can I do anything to change it?

Hello.I don't think that problem relates to your phone settings,though I might be wrong,the problem is in the messager service.Packets of information are lost and you only end up with parts of the message.It happens to me also but not on a regular basis.
I can't give you any serious advice,just this:try to put the sms data-center number again.It depends on your provider.And make sure your sms type is put to: (sms,normal,text).