Problems restoring from tape in AIX

I am trying to restore some files from a DLT drive in AIX 4.3 but I am having a few problems. Basically when I try to run the restore command I get the following error:

Cannot read from the specified input.
Please enter the device name when ready

I am the following command for the restore

cpio -ivcdm -C20480 </dev/rmt2

I am using the following command to write to the tape which seems to be okay and doesn't come back with any error messages:

find / -depth -print |cpio -oc -C20480 >/dev/rmt2

If I look at the tape drive in smit it shows me that it is available.

Any ideas????