AD group propagation to IM client

I have installed and configured Wildfire with LDAP(MS active directory) support and imported users and groups to admin console.but now I am not able to add AD groups to my IM client.it does not shows the users from that group, just show empty group .i have tried this in Spark and Pandion client, but no help .

anything to be done at server or client side???

Thanks in advance

Rawlins.