Problem calling simplebutton from library

Hi guys,
I'd like to ask for your assistance. I have a problem calling
SimpleButton from library. I already checked the Linkage:Export for
actionscript but still an error appear "Call to a possibly
undefined method OkBtn". I'm just wondering because this method
works on my MovieClips except for SimpleButtons. Is there another
way to call SimpleButtons?
Here's my code calling MovieClip:
var mc:MovieClip = new ourProduct();
and same in calling my SimpleButton:
var myOkBtn:SimpleButton = new OkBtn();
please help.
Thank you very much

Hi again,
Since I could not call my SimpleButton inside the library, I
was thinking of putting my button inside the movieclip and call
that clip inside my library.
On my stage, I called
underConstructionPane() movieclip. This
underConstructionPane contains
myOkBtn which previously I wanted to call but as a work
around, I just put it inside
underConstructionPane movieclip with instance name of
okBtn. I added eventHandler on
okBtn which supposed to call
showHome() function outside
underConstructionPane.
showHome() was declared on the stage or root (I don't know
the correct term. hehehe
sorry.) but I don't know how to call that function.
I tried this:
var home = new showHome();
but it won't work.
Please help me
Thank you.

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___[MOD] C:\Documents and Settings\Elie A. Cohen.USINC022\My Documents\Visual Studio 2010\Projects\Repo API Example\Repo API Example\obj\x86\Release\Interop.axb.dll
| M A N I F E S T
|___[NSP] axb
| |___[INT] axb.axb
| | | .class interface public abstract auto ansi import /*02000006*/
| | | implements axb.axbDispatch/*02000003*/
| | | implements axb.axbSource_Event/*02000005*/
| | | .custom /*0C000018:0A000001*/ instance void [mscorlib/*23000001*/]System.Runtime.InteropServices.GuidAttribute/*01000002*/::.ctor(string) /* 0A000001 */ = ( 01 00 24 34 45 36 44 30 44 41 38 2D 36 41 45 44 // ..$4E6D0DA8-6AED ...
| | | .custom /*0C000019:0A000007*/ instance void [mscorlib/*23000001*/]System.Runtime.InteropServices.CoClassAttribute/*01000009*/::.ctor(class [mscorlib/*23000001*/]System.Type/*01000007*/) /* 0A000007 */ = ( 01 00 0C 61 78 62 2E 61 78 62 43 6C 61 73 73 00 // ...axb.axbClass. ...
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| | |___[MET] method .ctor : void()
| | |___[MET] method equals : bool(object)
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| | |___[MET] method hashCode : int32()
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Message=Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
Source=mscorlib
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at System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache)
at System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipVisibilityChecks, Boolean skipCheckThis, Boolean fillCache)
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