FWIW, I just got the same response from both my OBi202 (slightly outdated firmware) and OBi200 (loaded with firmware 5264 which shows up on the dashboard as current). But they can still call each other. I suspect there is a problem on the OBi side.
To find out what firmware you are running, from the dashboard get into the advanced configuration menu ("Expert" mode) and then click on "Status" -> "System Status". The info can be found under "Product Information" -> "Software Version".
I don't know how to determine from the dashboard what OBiHAI considers the latest firmware load (except, of course, to have them install it on your unit). The best way to keep current seems to be to read the forum regularly.