For what it's worth I had the same problem on my NT 4.0 box.  Works great 
under Linux though...



> I'm trying to use the MPEG plugin described at:
> 
>   http://www.smalltalkconsulting.com/html/mpeg3source.html
> 
> I'm using Squeak 2.9alpha update #2988. I loaded in the changesets:
> 
>   MPEGPlayerJMM.10.cs
>   MPEGPlayerMorph.10.cs
> 
> I have the windows plugin in the same directory as the squeak
> executable and image. The windows plugin was from:
> 
>   http://spair.swiki.net/.uploads/Mpeg3Plugin.dll
> 
> When I try the any code on an mpg or mp3 I get a primitive failed
> error. An example is:
> 
>   foo _ MPEGPlayer playFile: 'test1.mpg'
> 
> The error being:
>   
>   "Error: a primitive has failed"
> 
>    MPEGFile class(Object)>>error:
>    MPEGFile class(Object)>>primitiveFailed
>    MPEGFile class>>primFileValidMPEG:
>    MPEGFile class>>isFileValidMPEG:
>    MPEGPlayer>>initialize:
>    MPEGPlayer>>initializeWithFileName:
>    MPEGPlayer class>>playFile:
>    UndefinedObject>>DoIt
>    Compiler>>evaluate:in:to:notifying:ifFail:
>    TextMorphEditor(ParagraphEditor)>>evaluateSelection
> 
> The same error in the same primitive occurs no matter what I try even
> with different .mpg's which seem valid according to other programs. 
> 
> Any ideas what I might be doing wrong? Do I need to do anything to
> 'register' the plugin DLL or anything? Anyone using it on Windows?
> 
> Chris.
> 
>