|High speed modems don't need to be configured.|
Your model is a combo modem / router, not just a modem. Routers may need to be configured.
You read the MANUAL for the model, for the region you bought the modem/router in if there are different versions, if that applies.
The full version MANUAL is probably on the CD that came with the combo modem / router.
If you don't have that, there's one here
The first one probably has less detail than the second one which is probably the full manual.
WHY do you want to change the firmware? - that's usually completely un-necessary.
Common reasons why you can't connect -
The default setting connection type (e.g dynamic connection) in the modem/router's configuration may not be suitable for what your ISP requires. See your ISP's web site if the default connection type settings do not work for you.
Some DSL or ADSL ISPs require that you register the MAC address (Physical address in the operating system) of either the combo modem/router , or a network adapter on your computer, on one of the ISP's web site pages. E.g. Telus . Usually that is done automatically when you use the ISP's software to set up a new connection.
A network adapter needs to be connected to the modem/router when you do that. If you can't connect to it wirelessly, you must connect a network cable between a computer's wired network adapter and the combo modem/router.
If your ISP DOES require that you register a MAC address.....
If you want to be able to connect to the internet through the combo modem/router from more than one computer, the configuration of the router probably has an option in it's WAN settings of you cloning the MAC address of one network adapter on a computer that has already been registered , or you can manually enter the MAC address that has already been registered.
If you want to be able to use more than one router or combo modem/router, you use the same registered MAC address in the WAN settings on all of them.
If you are trying to get a wireless adapter to connect to your combo router / modem, the wireless security settings on both ends of the wireless connection must be compatible with each other. E.g. both ends must be using the same security code or security password, if security is enabled. If you can't connect wirelessly to the modem/router and if that's the only connection you have to it, you must connect a network cable between the computer's wired network adapter and the modem/router in order to be able to access it's configuration.
If you need more info about getting a wireless connection to the combo modem/router to work, or your internet connection to the ISP to work, just say so.
I / we need to know your ISPs (!nternet Service Provider's) name.