Why did lion stopped reading my external hard drives?

I have a MBP which used to work fine with snow leopard, had also Paragon's NTFS software to allow reading my external hard drives (Western Digital's My Passport and Passport Essential with about 2.5 TB worth of data, music, photos, etc.) I decided to upgrade to Lion and after that... poof! my hard drives will show grayed on the disk utility with the "not mounted" message and my MBP will not read the data, even though it can access them, run the WD utility, unlock the drive but... nothing.
Any ideas on how to fix? I event spent the morning yesterda wit the Geniuses at the Apple store and they were clueless too. I did show them on a couple of snow leopard machines my data but they could not understand how to explain he issue. I loaded the WD's drivers for Mac (OS  X Lion support as advertised on their website) but nothing happens.
Fortunately I can still read my data on any other computer (my kids MB's, my office Windows, etc) but it is truly dissapointing that Lion has brought down all the good stuff Mac / Apple had been known about.
Any takers to this one?

Has the connection changed e.g. a different usb port?
You may need to allocate a permanent drive letter to the external hard drive.
See if this linked thread helps:
https://forums.adobe.com/message/3431036#3431036

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