LS300 No ACE Manager After Firmware Upgrade

I have encountered an issue whereby after upgrade to ver 4.4.7 from 4.3.4 I have no access via ACE Manager (9191) OTA. I can telnet and program via AT commands, I can Ping, Port Forwarding is operating correctly but no go to :9191. Any ideas? Note that I have upgraded several of these with no issues.