I was having issues installing my OBi200 since last week.
Like many other people, I contacted Polycom and got the same reply "Keep Trying"
after hearing the confirmation of the "**5 XXXX sent to the server" I waited 10 seconds, hit cancel, and tried again.
Between last week and today, I must've tried over 50 times.
Tonight, after reading the reply from poly which basically said to "keep trying, you'll eventually get it" I said to myself, I'll try 10 times in a row, if that x work, I'll complain again. I lost track but it was either 9 or 15 times, but then the screen changed into a different one, and walla!
Just want to give you some hope if you're still having issues.
Good Luck!