moving screen?

[Bart Tyson]

I was playing lunch hr. bb. I set screen at top of circle.(pick & roll). I take off straight to the basket. Next i see my teammate dribbling beside me and pass me to the loop. The defender is trailing the dribbler and can't get beside or in front of the dribbler because of me. Keep in mind the def. is not trying to go around me, but through me(up my back). Plus, the def. did get picked off and is trailing. What do you think?