May not be as simple as that, ex jaguar controllers used to disable the ports and as yours is 2nd user, it could be ex-jaguar.
Have you got ethernet port on the CPU card available?
If so check to see if Aux Func 189 is available, if it is you can use KCWinTCP or KRTerm Ethernet to go online instead when the IP settings have been set correctly and you are using a crossover cable.
Have you got a PCMCIA card available (max size 32Mb)?
If so, get a backup that way and attach it to a post (you would need to change the file extension to .txt in order to attach it to a post), I could have a look if it has been disabled and then send you a modified file to load in to release it.