AS3 Button under movieclip not working

[matmarlow]

In AS2 you could put a button under a movieclip and it would still work so you had to put a disabled button above it to stop it working. It seems that in AS3, a movie clip will disable button rollovers underneath it but I need it work!
I've done a very basic test to make sure my movie clip isn't set to buttonMode=true or anything like that but it still happens. Any ideas how to allow my button to work under the mc?

Thanks,
Mat

[Scott64]

movieClipInstance.mouseEnabled = false; //should do it