vCenter 5.5 Update 2b adapter stop collecting data after vRops 6.2 upgrade

Hi,

I've just upgraded my vRealize Operations to 6.2, and I'm working with two vCenter Servers – vCenter 5.5 Update 2b Build 2183111 (Windows OS), and vCenter Server 6 (Linux VCSA Appliance).

After the successful upgrade – the vCenter 5.5 stop collecting information (the adapter stuck on "Starting"), the vCenter 6 is fine and continue to collect information.

What I've done so far:

1. Restart both vROps and vCenter 5.5.
2. Click on the Stop button next to the vCenter 5.5 adapter and click on the Start.
3. Restart vCenter 5.5, Click on Stop, then wait to all vCenter services to get running and click on Start.

Anyone familiar with this issue and know how to solve it? I'll be glad to hear some tips/advices/workarounds/solutions to my issue.

Thanks! :-)