AS3 - invisible button doesn't work in loaded swf

hi all!

i have a main loader swf file called loader.swf and it loads 10 swf files inside a container. the 10 swf files have invisible buttons and when i test the 10 swf files alone the invBtn-s are work fine, but when i load them with the loader.swf the invBtn-s simply don’t work or react the mouse or anything…

what should i do?

thanks for any replies