POI appends data when calling class files 2 times.

[Michael Jovicevic]

Hi!
 
We are using a bea weblogic 8 server to create excel files with an jsp.
But when calling the jsp sometimes after another with different db data
poi appends these data to the one before.
Maybe caching problem or wrong creating of Worbook object?
 
pls help!
 
greetings Michael