Adding a cross domain user to AzMan

[Reza]

Hi

I have two domains parentdomain.com and childdomain.parentdomain.com
I have created Azman store in child domain. The problem is that I can't add
a user from parent domain to a role in AzMan. Even if I add a universal group
created in child domain to AzMan and then add a user from parent domain to
this group, Azman can not authenticate that user (the same problem), It seems
that AzMan does not support cross domain functionality. Is it true? How can I
solve it?

Regards.
Reza.