Animated mask issue

hi, i can’t seem to make my animated mask work, when i roll over “mc 1” i want “artclip” to gotoAndPlay(2), here is the code

mc 1:

on (rollOver) {

where “artclip” is a movieclip with an animated mask that plays on frame two (frame 1 says stop), then at the end of the animation i tell to gotoAndPlay(2) to loop the animation.

this seems simple and routine even to me, and i am not advanced with actionscript, i am hoping this is something simple, i searched for some threads on this but didn’t really find what i was looking for, so sorry in advance for the elementary problem…