# A very basic question

**URL:** <https://forum.kirupa.com/t/a-very-basic-question/86934>\
**Category:** programming\
**Created:** [April 16, 2005, 11:36pm UTC](https://forum.kirupa.com/t/a-very-basic-question/86934 "2005-04-16T23:36:26Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![adham\_a](https://avatars.discourse-cdn.com/v4/letter/a/91b2a8/32.png) [@adham\_a](https://forum.kirupa.com/u/adham_a)\
**Post date:** [April 16, 2005, 11:36pm UTC](https://forum.kirupa.com/t/a-very-basic-question/86934/1 "2005-04-16T23:36:26Z")

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Hello everyone

i was just wondering why most of the files (.fla) that i download from here do not open on flash MX 2004

by here i don’t mean this forum

am wondering if flash have backward compatibility

thanks