"MMS Messaging Requires Your MMS Email Address"

Hey Everyone,

Not sure why but... every time I access iMessage, I get this pop-up window that says, "MMS Messaging Requires Your MMS Email Address"

I don't want to use MMS and I have it DISABLED in the SETTINGS. And, actually, I have my MMS email address entered into the SETTINGS as requested.

I just don't want to use MMS and I don't want this pop-up window EVERY TIME I access iMessage.

HOW DO I GET RID OF THIS?