Are you saying that you can't save the network settings?
If so, I had this problem!
All I did was edit the ini file before I burnt it to disk, it cant change that after all its read only!!
Anyway, you need to make sure that you change the ini file to say
Network]
SetupNetwork = Yes
StaticIP = Yes
Ip = 192.168.0.2
Subnetmask = 255.255.255.0
Defaultgateway = 192.168.0.1
DNS1 = 0.0.0.0
DNS2 = 0.0.0.0
Make sure the FTP program has the username of xbox and the password set to xbox.
Cheers
Blue