For Art-Net you will want to change your IP address to 2.x.x.x or 10.x.x.x usually with a 255.0.0.0 subnet mask.
Also, probably the best diagnostic tool for Art-Net is DMX Workshop from Artistic Licence art-net.org.uk/resources/dmx-workshop/
Thank you so much for your help. It worked finally, I got it up and running. There was a problem with the IP address of the device and the network on my pc, but got it sorted. Also thanks for the tip about the diagnostic tools!