# A small doubt in flash cs3

**URL:** <https://forum.kirupa.com/t/a-small-doubt-in-flash-cs3/291886>\
**Category:** Uncategorized\
**Created:** [July 7, 2009, 5:07am UTC](https://forum.kirupa.com/t/a-small-doubt-in-flash-cs3/291886 "2009-07-07T05:07:30Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![rajesh\_flash](https://avatars.discourse-cdn.com/v4/letter/r/d2c977/32.png) [@rajesh\_flash](https://forum.kirupa.com/u/rajesh_flash)\
**Post date:** [July 7, 2009, 5:07am UTC](https://forum.kirupa.com/t/a-small-doubt-in-flash-cs3/291886/1 "2009-07-07T05:07:30Z")

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Dear Friends,  
I am having a small doubt in flash cs3.  
I am trying to display a simple “trace” statement from an .as file and it was throwing an error called **"5000: The class ‘class1’ must subclass ‘flash.display.MovieClip’ since it is linked to a library symbol of that type "**  
i am having only 1 fla named - document\_Class.fla  
and 1 .as file named - class1.as  
this is the simple code i writen for class1.as file ie  
package {  
public class class1 {  
public function class1():void {  
trace(“class1”)  
}  
}  
}  
inside fla ther is nothing…  
but when am writing the code as,  
package {  
import flash.display.MovieClip  
public class class1 extends MovieClip{  
public function class1():void {  
trace(“class1”)  
}  
}  
}  
its working fine… wats the difference with both the codes and why i have to import movieclip if am not using is my ques ??  
waiting for ur replies.  
Rajesh