# Dynamically attaching MC under mask

**URL:** <https://forum.kirupa.com/t/dynamically-attaching-mc-under-mask/303376>\
**Category:** flash\
**Created:** [January 19, 2010, 3:08pm UTC](https://forum.kirupa.com/t/dynamically-attaching-mc-under-mask/303376 "2010-01-19T15:08:39Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![hkunz](https://avatars.discourse-cdn.com/v4/letter/h/97f17d/32.png) [@hkunz](https://forum.kirupa.com/u/hkunz)\
**Post date:** [January 19, 2010, 3:08pm UTC](https://forum.kirupa.com/t/dynamically-attaching-mc-under-mask/303376/1 "2010-01-19T15:08:39Z")

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Hi, i’m new to kirupa. I’m an advanced flash developer and action scripter with more than 4 years of experience. I need to have an explanation to this problem. I have created a vector shape mask on the timeline that does different shape tweens. There is a movieclip container that is under the mask. When i dynamically load a movieclip from the library into that masked container, it will disappear after the keyframe of the shape tweened mask is reached. Why is that so? Isn’t that illogical? I attached a simple fla demo.