The /co command is a bit tricky because omitted variables are interpretted as disabled and therefore certain options get turned off. This includes DHCP which is likely getting switched off and causing connectivity issues. The following variables are the compelete list that are handled in the same fashion:
o2 – NTP
o3 – DHCP
o21 – Use rain sensor
o22 – Rain sensor type
o25 – Ignore password
If any of these are not provided to /co they will be disabled or turned off.
Hope this helps,
Samer