I have no idea how Ravi's answer is considered "correct" when he didn't address the most important aspect of your thread.
As far as I'm aware, you need to ensure both controllers are running the same firmware or 7.0.250.X.
Take a copy or export the config of the 4400 configuration to your TFTP server. Edit the file and change the necessary settings. Go to the 5500 and download this configuration file. Upgrade the firmware and the bootstrap if necessary.