help

what router do you have? 

what firmware is on it? 

What modem/gateway is it connected to? 

What are the led's on it doing? 

Whats actually going on in details? "not working" doesn't tell us much. 

There's a support site with access to manuals, firmware, install guides, etc.
Go to https://www.netgear.com/support/
Type in your model number and from there it'll take you to the above.
Its a great resource to start with.