I notice that the OP keeps detailed specs of his PC in his sig, but declined to mention the modem model. At least I can rest easy knowing my flames are arriving via the power of Intel Inside.
I am guessing you have a 7201HG. Here is the manual
TurtlePerson2/apsog33's address is correct, but it isn't working for you. Why?
1) Not the right model. Right now, only you can tell.
2) You have a separate router between your PC and the modem, and possibly NAT involving overlapping subnets.>Try connecting the PC directly to the modem, ensure connectivity, then try the address again. Subnet changes should be postponed until after you are able to successfully connect.
3) DNS tomfoolery. The modem's IP is likely either the router's WAN gateway IP (assuming you have a router) or your PCs gateway IP (directly connected).
#182 TT: 13/DNVT, Precedence: Flash Override. Switch: Node Center. MSE forever.