I've just renewed my license and upgraded to B4i 5.00. The new hosting account ID works fine in the IDE, but when I use it with the OTA Deployer (v2.00) i get the following error: Error: Make sure that the account id is correct
(java.net.SocketException: Connection reset by peer: socket write error)
It's working now. I used my old hosting account ID (which was still valid until June 30) and launched a second instance of OTA Deployer with the new hosting account ID.
Not sure if this was the solution, but everything's working now.