Custom form not showing when recurrence is set for a meeting


Outlook version
Outlook 2013 32 bit
Email Account
I am using custom appointment form to setup meetings. This works fine in normal scenario.

When I set up a recurrence meeting using the custom form and if I try to edit entire series it shows the custom form. But when I try to edit one of the instance of the meeting from the series then it does not show custom form.

Please help.