When I created a server in LFS and wanted to associate an application with InSim which she would tell me when I connected her InSim: version 0 requested - using 6 and I do not know how to fix it.

First, use the right section if you wanna be answered by the community.

This message is an info, not an error. So, just don't worry about.

When you send the ISI packet to initialise the connection, one of the parameters you pass is for which insim version you want to use. If you don't specify, then it'll see that as a request for 0 and use version 6 - that's the message you're getting.

There's some new packets in version 7, plus a couple of breaking changes to version 6 packets, but 6 is fine if you don't need the new packets.