Rewiring Cubase 5 (32-bit) with Reason 8 (32-bit)

Hello all!

I’m new to the forum. We have copies of Cubase 5 and Reason 8 at our school which have all been installed at 32-bit. For some strange reason, Rewire will not work on 4 out of the 9 machines even though the settings are all the same. Rewire is not displayed in the ‘Devices’ drop down menu of Cubase as it should and Cubase and Reason are not synced. I’ve tried uninstalling and re-installing but I have had no luck. Any ideas?