Contriling a movie clip from a movie clip

Hi =)

ok here is what I am doing and need help with.

on my main time line I have 2 movie clips. I have a movie clip that contains all my navigation that is avaibe at all times.

and on frame 15 I have a movieclip that is an empty container (called “container”)that has a external swf files being loaded into it (portfolio.swf)

in my navigation movieclip I have a button that reads
on (release) {
_root.gotoAndStop(15);
}

perfect! does exactly what I want it to, now…
I have another button in the same navigation movieclip that I want to do the same thing but I want it to go to frame 2 of the portfolio.swf instead of starting at frame 1.

hope I have given enough info, thanks in advance