Gateway update and RDM connection

We just got new Robert Juliat LED Profilers that don't have a display and can only be configured via Web Interface or RDM. So now we tried to do it via RDM to not have to give them fixed addresses, and it worked as long as we plugged in to the local DMX Outputs on our Gio @5. However as soon as it was over Network with a Response Mk2 Gateway inbetween it didn't work anymore. The ETC tech support said to update the software of the gateway and here's my Problem:

I got it as far as having the gateway recognized by UpdatorAtor and I got all the Softwares Installed, However in the Tag "Software version" it didn't change from "Finding" to the current software (I waited for about 10 minutes).

Does anyone know where the problem could be? Could the software update interfere with the compatibillity with the rest of my network and what else could be the problem with the RDM Network connection?

It's our first time working with stuff like this...

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