The device is most certainly not supported in 1.02 firmwares.
USB wireless dongles must be supported by the official firmware. WD added more and newer drivers with every firmware release (this is why your device is working in 1.06 firmware but not in 1.02 firmware). Unfortunately there is no way for us to add new devices to older firmware versions.
Either the device works with the official firmware version your WDLXTV version is based on (the first number in the firmware name) or it won't work atall.
(It wouldn't even work if we compile a new driver for the device and add it to WDLXTV!)
WDLXTV Project Maintainer
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for a beer or a new flash drive. ...and always remember: RTFM! (README