# In reguards to the "Using the Tween Class" tutorial

**URL:** <https://forum.kirupa.com/t/in-reguards-to-the-using-the-tween-class-tutorial/175405>\
**Category:** Uncategorized\
**Created:** [January 14, 2006, 1:16am UTC](https://forum.kirupa.com/t/in-reguards-to-the-using-the-tween-class-tutorial/175405 "2006-01-14T01:16:02Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![jaydot](https://avatars.discourse-cdn.com/v4/letter/j/8c91f0/32.png) [@jaydot](https://forum.kirupa.com/u/jaydot)\
**Post date:** [January 14, 2006, 1:16am UTC](https://forum.kirupa.com/t/in-reguards-to-the-using-the-tween-class-tutorial/175405/1 "2006-01-14T01:16:02Z")

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When i download the file, and open it up in Flash, it tells me “Unexpected File Format”.

Um… What the hell is going on? I’m running Flash MX (not sure if its 2004 or not)