USB Device no longer recognized (Ratoc U2SCXU SCSI Converter)

I'm having problems with a device that used to work fine in an older MacOS (10.5, Leopard) but no longer being recognized in Lion. The Ratoc Systems International SCSI COnverter model U2SCXU is no longer visible in System Information, their Utility, nor the scanning software (VueScan). This set up used to work seamlessly in previous OS's.
The Ratoc device is being powered through the SCSI connection and lights the power light no problem. No matter wherther through a hub or direct, the USB is no recognized nor is the software. I tried to email the manufacturer but in the meantime thought to post this as a question while waiting... Does anyone have a similar problem?
Using with a Polaroid SprintScan4000 negative scanner. This device and the converter were all running and playing happily in OS X 10.5. There seems to be nothing I can do to make the device appear in the window, nor be recognized in software. Also tried with laptop running the same OS. I believe this is a software issue with the OS. There is a firmware update that might be able to be applied via the Utility software (U2SCXU_50) from Ratoc website, except that the Utility doesn't see this unit either.

Make sure it's the right series usb 3 driver, series 7 or series 8. Series 7 drivers are version 1.x and series 8 are version 2.x. They use the same device id's.

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USB Device no longer recognized (Ratoc U2SCXU SCSI Converter)

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