Unable to enable baxter while roscore service works

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Hi,

I have recently moved and now i cannot connect to baxter anymore. it works fine if i run roscore, but if i try to enable it with baxter_tools enable_robot.py i get the error message

Unable to register with master node [http://<baxter_hostname>:11311]: master may not be running yet. Will keep trying.

Any idea? it worked fine before the move.