No longer have the option to send pics or files using my messaging app.

I have a ZTE Blade phone. K am using the default messaging app that came with the phone. I do not have the option to send files or pics. (By clicking on the paperclip which does not appear in the message.) I cannot receive files or pics as well. I checked my settings and could not find an issue. Does anyone have any ideas what is causing this restriction to send or receive files or pics?

Mms is network enabled. Chat with your network provider (on a different phone) and they will go through your settings with you...