how to use the sample.dll

hello
i'm a developer in small buisness contribute to OpenSource
i'm find a solution with install with a xpi a sample XPCOM
install is Ok

but a messageBox to load a page Xpcom-sample.html
	
"the procedure entry point NS_CHeckThreadSafe could not be located in 
the dynamic link library xpcom.dll"

And in the JavaSrpitConsole

" Error: Components.classes['@mozilla.org/sample;1'] has no properties
Source File: file:///C:/DOCUME~1/ANGELO~1.BID/Desktop/XPCONN~1.HTM
Line: 120 "

view my sample.xpi with the attachaments .


help me

thank you

Angi