I can create the email with the subject, to, and mailbody, but trying to add an attachment is maddening.

Code:
<a href="Mailto:<%=custrepemail%>?cc=<%=Mgr & ";" & contact & ";" & CellMail%>&subject=<%=mailsubject%>&body=<%=mailbodyx%>&attachment=""<%=mailattach%>"""><font size=5>Send Email</font></a>
Format is correct as far as I can see. Now, the file exists on a shared drive and I refer to it directly:
Code:
Mailattach="\\Servername\docs\GenSHi-PRT.doc"
It opens, filling the correct areas except the attachment. I have also tried calling it by the drive name and locally as well.
Aarrgghh...

What else can I try?