We had the same issue, status info working, performance data not available.
Setting the registry values to 0 will make loose any historical data, also those from vCenters 5.5 update 2 and earlier.
This is explicitly described here: https://www.veeam.com/kb1609The better way:
Fix it for vCenter 5.5 update 3 and above, and leave other vCenters with historical data UNTOUCHED.
Therefore install Veeam-Fix, which is available here: https://www.veeam.com/kb2071
I've installed that fix and it works fine, leave older data untouched as promised, left the registry keys mentioned under bk1609 untouched, too.
Hope this works for others, too.