MQSeries.net :: View topic - Achieving Non-persistant TCP connection

GeneRK4

I am trying to achieve Non-persistant connection through TCP nodes.
In our scenario,WMB is acting as TCP client and trying to establish TCP connection with a TCP Remote system.

I am trying to achieve Three-way handshake with the Remote system.

While doing so,in the last TCP-Client output node where Three-way handshake Confirmation message is sent,I am giving "After data has been sent" for "Close Connection" property.This is closing connection properly for every transaction with one TCP Remote System.

But, this is not closing connection for some other TCP Remote System.Its always in Established status.I even tried to push a dummy message in the Close input Terminal in the same Connection ID.Still its not closing the connection.Is this could be a problem with the Remote system?Or problem with the way the connection is configured at our end?
The Remote system contact person says that,there is no change except for the IP address change between the working TCP Remote system and the not-working remote system.
Could someone suggest what may have gone wrong in this scenario?