SwfPanel Not Loading from SWC

Question

I'm working in Flash CS5, with FlashDevelop as my external text editor. Everything is AS3.
I have a custom component I've created that has HTML text content.
I  created a small Flex 3.5 application as a SWFPanel Custom UI for this.  Nothing fancy - really just a RichTextEditor wired up to the component's  HtmlText property.
I set the Custom UI in the ComponentDefinition, choosing external.
Everything  works great - I can edit my text from the components panel, all as  expected. Some tracing code that I put in the Custom UI shows up in my  Flash logs, and the output panel, as expected.
I compile my component as an SWC, then export it, then  import the SWC into a new movie. The component works as expected but my  Custom UI doesn't load (this is all on the same machine, so the path  should not have changed). In the component inspector I just get an empty  white panel and the tracing code no longer appears.
I  go back, and change from having the Custom UI as an external SWF to  embedding it. Now the UI doesn't load, even in my original test movie,  and it still doesn't work when exported as an SWC.
If I unpack the SWC, incidentally, I can see that all the Custom UI code is embedded there, as it should be.
In  the Flash Log for the main movie, I get no errors at all at any time.  In the movie where I've imported the SWF, I occasionally get the  following, but not necessarily when selecting the component in question:
TypeError: Error #1009: Cannot access a property or method of a null object reference.
     at StageCore::StageObject/UpdateSelection()
     at StagePlayer$/InvalidateStage()
     at Function/http://adobe.com/AS3/2006/builtin::apply()
     at flash.external::ExternalInterface$/_callIn()
     at Function/<anonymous>()
TypeError: Error #1009: Cannot access a property or method of a null object reference.
    at StageCore::StageObject/GetRealObject()
    at StageCore::StageObject/ClearStage()
    at StageCore::MainStage/ClearTree()
    at StagePlayer$/RemoveView()
    at Function/http://adobe.com/AS3/2006/builtin::apply()
    at flash.external::ExternalInterface$/_callIn()
    at Function/<anonymous>()
Has  anyone experienced this problem? Any idea what it might be? Is the fact  that the SwfPanel is a flex app problematic? If so, why does it work in  the test movie but not when exported?
Any help would  be appreciated. I'm really in a hurry on this so I'm cross-posting to  the extensions and AS3 fora in the hope that someone might have an  answer. I think I've read all the CS3 component tutorials out there but  nothing seems to cover this problem except some old stuff about AS3  being problematic in SwfPanels. Not sure if this is still current  though.
Thanks in advance, as always, for any assistance.
Jude

Answer 1

Thanks a lot Jens Petersen
It's is loading ..........
MI means miniute.
am i correct.
but i didn't get the logic behind that.
can u please explain that.
Thanks & Regards
Salih KM