Cant add Storage Node 19.1 in Networker version 7.6.4

Hello, dear friends,

I have the following scenario, I have Networker version 7.6.1 and a StorageNode 19.1, I have to recover some tapes of type LTO4 and I encounter the following.
I have Networker 7.6.4 with win 2003 and at the moment of adding the current storagenode 19.1 it gives me an error:
Detection process for host xxxx reports Networker server xxxxx is not in the server file for the networker client xxxxx : Errno 943."
In this case I understand that it is because they are different versions, isn't it?
The 2nd point, I have the current Networker with Version 19.2 and everything works fine, but when I run that old LT4 tape, it stays in a state of "Refreshing" and does nothing.

Can anyone think how I can do a restore of those tapes recorded with old data, that can work?

Thank you very much for your kind help

Best regards