Unable to convert BMP files through command line

Hy Guys,

I am unable to convert BMP files to PDF using the command line.  The PDFCreator application stops responding because the BMP was openned by Windows Pictures and Fax viewer and freezes. 

I have changed the file type association to Paint, but the app still opens with the viewer.  I have tested and the Paint application does work with the PDFCreator printer.

Does someone have an answer?