@VernonE You can reset WR940N to factory defaults and re-configure from scratch to be sure that everything's done properly. Use your user guide for reference. The IP address of the WR940 should be in...

@Newtonetwrok Make sure you're using the original cable from the C6 kit to connect to the wall socket. Check the negotiated speed of your Internet port here: If it's less than 100 mbps then try...

@bugginb25 See here the typical scenarios for connecting the Deco units with ethernet cable.

@davidecit Take a look at the Q1,Q2,Q3,Q5 and Q6 in this FAQ.

@beshur If device is configured succesfully in range extender mode, it should be possible to use its LAN ethernet ports as well for accessing the intenet. Have you tried to connect any other device...

@VernonE It's quite possible that you can't build a successful wireless connection with your new ISP router - check this thread. If that's the case and if cabling is possible I would suggest you to...