device not found after reboot
 

I have a Linux Redhat 7.0 server with a token ring card, that fails to activate the card on reboot. After further investigation, the card has a config file in /etc/sysconfig/network-scripts (ifcfg-tr0). The file contains ONBOOT=yes as well as IP address etc.
When I try ifup tr0, it doesn't report an error, but ifconfig does not show the device.

I tried: ifconfig tr0 192.168.0.1 netmask 255.255.255.0 up
This reported device tr0 not found.

If I use the X Windows network config tool to add the device (IBM token ring default driver), then activate it, all is fine until the next reboot.

Any help would be appreciated, as I am not geographically located where the server is and on-site I.T. staff are too inept to use the network app.