Getting Midi Input To The Computer?, MIDI input to computer not happening. Options

[Rogers]

I am new at MIDI stuff, and am working with an imac on OS9.2. I have the Sibelius program, Two different Yamaha keyboards that are happy to talk to each other. An Edirol UM-1S driver MIDI interface to the computers USB port.
I have loaded on the computer the driver, both freeMIDI and OMS.
I am able to get Sibelius to play back to the Yamaha keyboard, but, no input is being received to Sibelius.
The channels are all on 1 for receiving and sending.
I've tried it with local voice on and off.

What else can I do. I really want to play music throguh to Sibelius.

I tried using the harmony program which is OMS and that froze the computer.

OMS seems to be causing disfunction, so I have switched it off in the extensions file and am using freeMIDI.

I have just read that the UM-1S needs OSX.

What can be the problem?
The driver, the OS, the location of OMS?

Can anyone help.

Thanks.