Unable to Add Virtual Machine Name - VMware

Dear All,

NBU 7.6.0.3 on Solaris 11 sparc Master.

Backup Host : VM on RHEL 6.2

Vsphere : 5:5 (ESX)

Adding Virtual Machine through GUI but unable to do so as it is showing following error.

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The operation timed out. The operation has exceeded the time out limit, though the service or daemon may still be processing the request (195).

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Need your suggestion/comments on this.

Thanks in Advance.