I got the following error message from Visual Foxpro when I execute SEND command. What's wrong?

"OLE error code 0x80070006: Unknown COM status code"

My VFP code is the following:
x=createobject('faxserver.faxserver')
lcMachine='\\'+getwordnum(sys(0),1)
x.connect(lcMachine)
fd=x.createdocument('filename')
fd.faxnumber='999-999-9999'
fd.displayname='VFP Fax Message'
fd.filename=fullpath('samplefax.doc')
fd.sendcoverpage=.f.
fd.send && I got the error here