Blackjack i607 multimedia mssg config/sett?

every time i try open or send a mms on my blackjack i607 there is a error mss that pops up that says "unable to connect verify your profile settings and try again" i have unlimited txt but my mms wont work could some one with a blackjack or that know the right answer for me please send me the setting for this phone or give me a reference plz n thnk u