[ubuntu] Trust/Waltop Flex tablet pen no longer moves when hovering

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http://ubuntuforums.org – I bought a Trust Flex (Waltop rebranded) tablet not long ago, and set it up to use with natty on my laptop. I installed the wizardpen driver and, apart from being unable to use the second pen button, the tablet worked fine. Then a few days ago the pen stopped moving when hovering above the tablet; ie, you have to touch pen to tablet to move. I uninstalled and reinstalled the driver to no avail, then tried using the Wacom driver instead, still with no success. Any suggestions as to why this might be happening or how I could fix it? Thanks :-) (Hardware)