Application doesn't use MySQL Query Cache..

[shacka]

Hi, all..

First, here is the setting..
- jboss3.2.5 on RedHat Linux 9
- MySQL server 4.0.20-standard
- Connector/J 3.0.14-production from MySQL
- EJB application with all standard CMP, stateless sessoin beans

Here is my problem..

I'm using MySQL Administrator (1.0.9) program from MySQL to monitor
the status of MySQL server and I notice that there is no activity for "Query Cache Hitrate" when I run my EJB application..

However, I can see activities when I using Bugzilla which runs on the
same server with same MySQL server..

So, it doesn't seem like configuration problem of MySQL (of course I checked all the system variables such as 'have_query_cache', 'query_cache_type', etc)

Can it be the Connector/J problem..?
or did I missed any jboss settings..??

Thanks...