Not able to see Export Option in vCenter 5.1

Hello...

I would like to export one VM from my one Datacenter to another datacenter (from ESX 4.0 to ESXi 5.1) . As i am unable to do SVmotion due to VM has multiple snapshot.

vCenter standalone convertor installed on my vCenter server.  Could you please help me to resolve this..

Here is my VMware infrasture.

1. ESXi 5.1 - more than 50 hosts

2. vCenter Server 5.1 - 1 vCenter Server

3. Standalone convertor 5.1 - installed on vCenter Server.

Thanks you.