Item state change events - notification not recd when run on nokia phone

I have a Form which implements ItemStateListener and its registered to receive item state change events. The Form has a text field which needs to be enabled/disabled based on certain ChoiceGroup element being selected. The code works fine on emulator, however I don't receive event notification in itemStateChanged() on series 60 nokia devices when a new ChoiceGroup element gets selected. Has anyone faced a similar problem? Is there any solution for this? The profile used in my project is CLDC 1.1 and MIDP 2.0.

I faced a similar problem on Motorola ROKR E6. Turned out that ItemStateListener was working only as long as the first form to be displayed remained current -- once I setCurrent another Form, the app stopped responding to itemStateChanged.
The workaround I adopted was to remove Items from the Form and add new Items, giving the illusion of the next form being displayed. It would be interesting to know whether that works for you and whether anyone has faced the same problem with any other handset.
I have subsequently come to know that Motorola have marked my bug report as "solved" -- but have not offered me any option to update my handset with a bug-free version.
btw, calling setConstraints on a TextField can throw a NullPointerException. My workaround for that was to setText("") in the itemStateChanged in lieu of setConstraints (TextField.UNEDITABLE).
luck, db

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