Tab key dosent work on some machines

Hi,
We have a swing application in which we use tab key to navigate input fields. The problem is that on some machines the tab key does not do anything where on some it works perfectly.
Could it be a JRE version or any other issue? (OS is Windows 2000 on all machines)
Any input will be much appreciated.
Thanks,

What version are you using? 1.4 or 1.3.1

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Tab key dosent work on some machines

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