SNA sense data = 0032000F

I am using the Host Integration Server (HIS) to connect to an IBM mainframe running on CICS.
The transport protocol is LU6.2.
The program has been runing fine for a few weeks when suddenly, it stops with the following error
log at the HIS side:
APPC Session activation Failure:
BIND negative response or UNBIND request received.
Sense data: 0032000F
Connection: BOCHK
LU Alias: RCDM01A
RLU Alias: ATMPCICS
Mode Name: SNASVCMG / M62APPC
A search at the Microsoft site result in 'Article ID: 129625. It mention that the problem is caused by a configuration mismatch. However, I find it strange that there is a configuration mismatch because it has been running fine for a few weeks, and the error just suddenly appear out of the blue.
On investigation, I find that the error was triggered by WinCPICStartup().
The way that the design was done to connect to the mainframe is that when there is a need to get data from the mainframe, then, a connection (WinCPICStartup(), cminit(), cmallc() etc . . . cmdeal()) is initiated.
So, after running for sometime, the initiation to connect fails suddenly with the above logged.
We find that after the Server is rebooted, connection could be re-established again.
Kindly let us know what could be the problem,
Thank You
Regards,
Viknes
[2418 byte] By [Viknes] at [2008-1-9]