I have recently picked up a BCM 400 3.0.1 System. I have been able to access through null modem cable using super/visor. System shows standard ip 10.10.10.1 and 10.10.11.1 My PC setup for my BCM 400 4.0 with crossover cable (which can access the 4.0 system no problem. What can I do different to access 3.0.1 through ethernet? What am I missing?