TASCAM US 1800 Audio Interface

My TASCAM US 1800 does not work with my cubase 8.5 any suggestion to fix the driver or patch that will support the driver?

It would be easier to help if you let us know your operating system .

Sorry, I am using the Mac Mini OS X Yosemite 10.10

Have you got the latest driver for OS X 10.10?
http://tascam.com/product/us-1800/downloads/