# Blur filter in class file

**URL:** <https://forum.kirupa.com/t/blur-filter-in-class-file/218433>\
**Category:** Uncategorized\
**Created:** [March 7, 2007, 6:38pm UTC](https://forum.kirupa.com/t/blur-filter-in-class-file/218433 "2007-03-07T18:38:16Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![newbie\_geek](https://avatars.discourse-cdn.com/v4/letter/n/d9b06d/32.png) [@newbie\_geek](https://forum.kirupa.com/u/newbie_geek)\
**Post date:** [March 7, 2007, 6:38pm UTC](https://forum.kirupa.com/t/blur-filter-in-class-file/218433/1 "2007-03-07T18:38:16Z")

</div>

I am using

```auto
var blurFilter:Array = this_mc.filters;
blurFilter[0].blurX = 10;
this_mc.filters = blurFilter;

```

to induce a 10px blur on my MC. It works when the code is placed right on the timeline of the MC in question.

However when i use the exact same code in an external “effects” class file, it does not work.

Should i be looking at refferencing problems? Scoping problems? What gives?