Movieclip button does not work with mask

Not very good at AS, so I am looking for help with a small problem. I have a movieclip that i have incorperated a “rewind” script from kirupa. My problem is that my MC button has a mask and does not respond due to the mask. Does anyone have an alternative solution that would allow my rollout by rewinding the timeline for a smooth transition on rollout. Thanks for any help…