fms : ‘onDisconnect’ not called up with MS Internet Explorer users

Hello

We are using Flash media server 3.5 with Windows.
We have deconnection problems with visitors using Microsoft Internet  Explorer (to be fully confirmed but we are nearly 100% sure) and in chat  rooms; there they wait for their turn to speak to an online consultant,  sometimes this waiting list can be 10 to 15 strong.
Normally, when a client is automatically disconnected from a session,  whatever the reason it is the ‘onDisconnect’ which is called up.
Sometimes and with MS Internet Explorer this is not the case : the  visitor or user is not anymore present in the chat room, he has quit or  he got his interview with the consultant but ‘onDisconnect’ is not  launched.
This causes unexpected problems like one or several people in the  waiting list being kicked out of the ‘room all of a sudden without  explanation for the user.

Normally our consultants are on the air for one hour; after this time  frame another consultant comes into the same chat room and normally he  gets the remaining waiting list from the previous consultant and the  previous hour of chat. Sometimes but often, the new consultant coming in  sees the first one or the first two of the wainting list kicked out of  the list : he then takes the second or third one in the old waiting  list.

This is very annoying and time consuming to respond to legitimate calls from customers.

Have you encountered such a problem, and if so, do you have an answer to the problem ?

Regards