You need to reconfigure the link. There are quite a few tech notes on how to do this on the AB website.
I actually have a AVI file that I downloaded from their website which goes into exact detail.
I will try to post it....No, too big.
If you are connected Ethernet to a controller, you need to ADD the ethernet driver to RSLINX-ENTERPRISE first. Then, add the Controller that you wish to talk to. Then, copy the link from Local to Target, or vice versa.
You really need to read the instructions.
My chicken scratch instructions will take more than 1000 words, where if you just download the technote, it will solve your problem.