How can I use a UTF-16 encoded Signature with RDO

Question

I'm trying to use a UTF-16 encoded Signature in an Email. The Files are in the usual Place (%APPDATA%\Microsoft\Signatures). When I use the signature in Outlook it works but when I try to create the Mail using RDO I only see the BOM (ÿþ<)

LMail    := Session.GetDefaultFolder(olFolderDrafts).Items.Add(olMailItem);
LSession := Session.Signatures.Item('SignatureName');
LSignature.ApplyTo(LMail, False);
LMail.Display(True, 0);

I thought that Setting LMail.InternetCodepage might help but this has had no effect. Any Ideas?