It's impossible to tell what's going on from that description. Does the
addin load at all, does the OnConnection() event fire?

If that event doesn't fire does the COM AddIns tab in the trust center show
there was an error on loading the addin? If that's the case you must do some
Fusion logging analysis to see where the loading is failing. There's an
article on debugging managed code addin failures at
http://blogs.msdn.com/vsod/archive/2...-failures.aspx
that you should read.

--
Ken Slovak
[MVP - Outlook]
http://www.slovaktech.com
Author: Professional Programming Outlook 2007.
Reminder Manager, Extended Reminders, Attachment Options.
http://www.slovaktech.com/products.htm


"paresh" wrote in message
...
Hi, I wrote Outlook COM Add-in in 2003 using C# and since ages it has been
working fine in OL2003. We are in process on migrating to OL2007. I found
that my Add-in doesn't work on OL2007. Could anyone please tell me what
are
the possiblities so that Add-in can't work on OL2007.

Thanks in advanced.
Paresh