AO Server issue

Hello,

I am working with the Asset monitors and Asset optimization. I loaded all my asset monitors to the server and was working fine. All of a sudden i am seeing the following message "unknown unable to connect to AO server" and if i try to load the asset monitor following error message appears "Failed to activate the configuration: 500 Internal server error; SoapEnvrFault node not found in response XMLNode".

Kindly let me know how to recover from this situation.

I tried following stopped the services and restarted again and then restarted the ao server node also no success.

Regards,

Narendar