# A .swf won't behave the way it should when opened within another swf.. ?!

**URL:** <https://forum.kirupa.com/t/a-swf-wont-behave-the-way-it-should-when-opened-within-another-swf/234633>\
**Category:** Uncategorized\
**Created:** [August 4, 2007, 12:03am UTC](https://forum.kirupa.com/t/a-swf-wont-behave-the-way-it-should-when-opened-within-another-swf/234633 "2007-08-04T00:03:19Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![briotron](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/briotron/32/3957_2.png) [@briotron](https://forum.kirupa.com/u/briotron)\
**Post date:** [August 4, 2007, 12:03am UTC](https://forum.kirupa.com/t/a-swf-wont-behave-the-way-it-should-when-opened-within-another-swf/234633/1 "2007-08-04T00:03:19Z")

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Are there known common problems with loading .swfs modularly, ahem, within other .swfs? are there common precautions that should be taken?

For example I’ve got one that has a menu that appears and dissapears upon rollover, with a neat multi-MC mask effect. The effect works when I test the .swf on its own but when loaded in an external .swf, everything works fine except for this mask effect. uugh