VMware browse client list timing out with "socket time out error"

Master server : WIN2K8 Enter R2

No of VC servers: 15

VC versions: 4.1, 5.0

Netbackup version: 7.5.0.5

Trying to browse vmware clients list has been consistenly timing out with socket time out error. On the master server, bpvmutil process run for about 2hrs and completes. But whenever I tried to re-browse for client lists, it still kept timing out.

I found this TN about excluding VC you are not intrested in when browsing: http://www.symantec.com/business/support/index?page=content&id=TECH190396

But would like to know how to include these exclude list when you need to add VMs from them.