Canvas Tab not showing

I'm on Oracle 9i Developer Suite and when I go to one of my forms (web-based), it's a TABBED-based canvas. I have a total of 6 tabs. Each one is based on a different data block tied to a table. One of my tabs doesn't show up. I have a WHEN-TAB-PAGE-CHANGED TRIGGER and it checks to see what tab you clicked on. Based on the name it goes to the datablock and then executes a query to retrieve all the records. On 5 out 6 it works fine. But only 1 (it's the 4th from the beginning). The only triggers I have on the block (same for all 6) are a PRE-UPDATE, and a PRE-INSERT. Connecting to an Oracle 9i database as well viewing through an IE browser.
Any clues?
Thanks,
Gio

Check the obvious: "Enabled" and "Visible" properties of the tab pages of the tab canvas set to Yes?
Any typos in the WHEN-TAB-PAGE-CHANGED trigger?
With the tab page's name do a "Find and replace PL/SQL" to look for code that manipulates the tab page (well you should at least find your WHEN-TAB-PAGE-CHANGED trigger).
Gerald

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