jTable not scrolling

I have a jTabbedPane. Inside one tab is a panel containing two jScrollpanes each containing a jTable. The jTables will not scroll and will only show a default 4 rows. Is there something inherently incorrect about this or should I be able to get it to work? Uing Netbeans 5 IDE.

There's nothing inherently wrong with it
as you describe, but it's hard to go much
further without seeing the actual layout
code.

Are you sure the JScrollPanes are there?
Can you see the table headers? Are you
sure the tables actually have more than
four rows? Did you write the code or did
NetBeans? Enquiring minds want to know.

Thanks.

Well when it comes down to it I am not sure of anything anymore what with global warming and yet the threat of cooling and tundra for the UK. I never did want to live in Labrador.

The GIU part was done in Netbeans and the database JDBC added by hand.
Yes more than 4 rows, the Scrollpanes appear to be there. I can post you the code.

Incidentally the horizontal scroll bar appears and works ok.

I had the containers the wrong sizes to fit together - all fine now