Session tables problem when used from multiple threads

HI All,
I have a problem with calling stored procedure in
multithreaded environment.
This procedure utilizes session table to collect data and
cursor to return it back to java application . When 10 threads are
trying to use the same stored procedure, once one of the thread
finishes up and returns connection back to the pool I'm getting
exception from all other 9 stored procedures :

com.ibm.db2.jdbc.app.DB2DBException: SC_PE00003 in QTEMP type *FILE
not found.

SC_PE00003 is my temporary table within the stored procedure.
I've even tried to establish new connection from each thread thinking
that session table will be unique within the
connection, but looks like they are still sharing temporary table
probably because my application runs as a batch job.
I'm stuck. I can't figure out what to do ?. How I can make these
session tables be unique within the stored procedure, or if it's
impossible at least within the connection.

Thanks,
Roman