Getting Channel 9-14 to be Active on 1800 with cubase

[eddiebrumley]

Hello I don't really know where to post this question and hope someone sees and can help me. I have Cubase LE7 and using the Tascam 1800 interface. Everything is working properly except I cannot use the 1/4 inputs. In devise setup it shows the instrument inputs inactive and I do not know how to get them active. I've you tubed info searched seems everywhere but no luck getting the answers. If someone can tell me the steps- process to get the 1/4 inputs to be active to record with please help me. I hope I described as much as possible. Thank you