Lightroom not detecting Lexar Pro card reader

Recently my old Lexar card reader died on me so I got a new one. It is plugged into my Mac desktop  High Sierra 10.13.1 and I have never had an issue with importing from my card reader until now.  When I insert the San Disk Extreme card, the import box used to show up on my LR (5.5 yes I know its old but it was working just fine). The Lexar card reader blue lights come on so I know it is connecting with the cf card. Now, when I go the Import Photos/Videos Lightroom is not even detecting the card reader as a source.  All the previous preferences have remained the same.  Any suggestions are appreciated!  Thanks!