Help with netconf Cisco IOS 12.2

Good Evening,

I am looking for help using netconf on a router running Cisco IOS 12.2. I know it is super old but it is what i have to work with.

I am trying to pull a list of vlan interfaces to so I can collect all the subnets the router is handling.

I am using python. So far I can connect via netconf and get the hello message from the router, but I am not able to send anything over. I keep getting RPC failed to respond.

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Most of what i can find is more for IOS-XE.

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Thanks!