The ActiveX component can not create the object

Dear friends,

I'm trying to add a watermark to my PDF files but I allways receive an arror when I include the AddWatermarkToPDF.vbs in the AfterSving action.

The error is:

The ActiveX component can not create the object:'Sripting.FileSystemObject'

Does somebody know why or if exists other way to put watermarks or form under the text created in PDF?

Thanks in advance

Luis Quintana