Hi,
Go to RMS, find your device and under the actions you should see Device Details icon. Click on it.
Once you're in the details page click on Update Information button.
Then click on View Update History, look for the date that you clicked Update information and look up if all the details provided as a result are correct.
After that head to your WebUI remote connection and try connecting to it with RMS again. Delete old links and create a new one.
It should work.
Let me know how it goes.
EB.