problems getting Archive 2150S running under ISC 3.2.2

[Frobnitz The Nth]

i'm trying to get my new Archive 2150S internal SCSI cartridge tape
drive running and have run into problems.

i've installed the driver at intr 0x3 and rebuilt the kernel.
the Drive Identification jumpers have been set to 1 (doing this should
make the drive ID 1, right?), and the Buffer Disconnect Size has been
set to 4K (i have no idea what it should really be set to).

when i boot the machine up, i get the following message:

SCSI 1 LUN 0  Archive Viper 150
Error in Read Capacity Command

when i try to run "/usr/lib/ctape status", i get the following:

ARCHIVE Ctape V1.2
NOTICE: Cartridge Tape Controller Not Found
Ct Control Byte = 000000FF
/usr/lib/tape/ctape: Cannot Open '/dev/rnmt0': No such device

"tar tvf /dev/rmt0" yields the following

NOTICE: Cartridge Tape Controller Not Found
Ct Control Byte = 000000FF

my current configuration is:

ISC 3.2.2
generic 386 box @ 25MHz, 387, 8 Mbytes RAM
Future Domain SCSI Controller
Micropolis 330Mbyte HD

Any hints/suggestions/ideas are welcome.