RTF file not printing from PHP com object

 I have tried 1.2.3, 1.3.0 and 1.3.1 and any time I send a rtf file to the com object it just hangs up. PDFcreator.exe launches and just hangs. I have no problems passing .xls, .doc, or .txt. If I print from wordpad to the pdfcreator printer it runs fine.