FMS closing connection of certain instances

Hello,

We just bought a license of FMS Interactive Server 4.5 and after testing our FMS applications local and on our test environment we are running into problems now on the 'live/production' server.

We are not doing any streaming, but we made a bingo game. This includes a chat and the FMS let's the clients know which ball is drawn etc..

We use handlers (aspx) to get some data for the bingo games (every 5 seconds). Every instance has 10 Shared Objects (max 3kb each). FMS is installed on a seperate server (Windows server 2008) with nothing else running on it.

The application is named 'bingo' and for every bingo room (4 at the moment) we use another instance. Which are:

<appname>/<instancename>

bingo/1

bingo/2

bingo/3

bingo/4

Where we use the instance name as the bingo room ID so we can get the right data for that room.

So what happens:

FMS closes connections on bingo/1 and bingo/2 while bingo/3 and bingo/4 are running fine.

Sometimes it closes bingo/1 and bingo/2 every few minutes, sometimes every few hours.

When we follow the logs in the FMS administration panel there is no error. It just stops.

If nobody is playing in these bingo rooms, it's no problem at all. But it is happening while people are in the rooms and while people are chatting (so there is communication between client and FMS)

We are talking about MAX 20 people playing at once at the moment, so it will not be a memory problem or something.

What did we already try:

- Setting all time-out configuration higher

- Sending a message from client side every 5 seconds to the FMS application 'to keep it alive'

In short the question is: Why is FMS closing connection on bingo/1 and bingo/2? And why not on bingo/3 and bingo/4?

Hope someone can help us out here

thanks in advance