MC Issue, Can Someone Advise Me

Hi All,
I am new to flash and I ran across a roadblock in my project.
My Main Page is a Flash Page, which opens all other swf files into a Blank_MC
The problem I seem to have is when I try to open an additional file inside this container in another blank MC, my buttons do nothing. I know I read somehere that to open inside, you need to stack the layers I believe? I tried the following with no luck.

(CODE)
on (release) {
loadMovie(“echoscd.swf”,_lockroot.ShowStuff_mc);
}

(CODE)
on (release) {
loadMovie(“echoscd.swf”,_parent.ShowStuff_mc);
}

I also tried _parent._Parent.ShowStuff.mc and Blank_mc._ShowStuff_mc

you can see what i mean at http://www.wolrdclasselvis.com and click on the merchandise page. Any help would be appreciated.
}