Hi,
The most possible reason is that the server asp.net process is recycled.
please check the new number after the NOCONNECTION ,
For example , you get _29A , that is a unique id of the object on the server.
When you get NOCONNECTION , if you get a smaller id , that means the cutechat restarted.
If so , the best way is find out why the server be reseted.
Regards,
Terry