Xcelsius Cache Server Setting Time in cache

Hi

I have Setup the Xcelsius Cache Server and Processing Servers within Business objects enterprise (available as part of latest BO Service pack) and all appears to be working when accessing data via QWAAS connections within the xcelsius. However the cache server seems to be generating new cache files every 20 minutes. From reading the supporting documentation . The documentation indicate that the session timeout as defined in advanced properties of the QWAAS wizard should determine the length of time that the query remains within the xcelsius cache server.

Has anyone had an experience with setting up the excelsius cache server.

Thanks