Customised form not working in Outlook 2007

Hi,

My company is rolling out MS Office 2007 progressively. This means that
some staff are still using Outlook 2003 and others are using 2007.

I created two customised forms using Outlook 2007. When I send these forms
to a 2007 user, they receive a blank email with my auto signature. When I
send them to a 2003 user, they work perfectly.

Any suggestions?
--
JenJen72