Hi folks,

I like your forum - friendly with well-informed responses.

I have problems connecting to the internet through my router. The connection is fine when I connect directly to the cable modem. My computer sees the router (I can log into to administer the router's configuration file) but not the internet when the router is inbetween the computer and the cable modem.

ISP: Road Runner
Cable Modem: Motorola SB5100 - brand new
Router: Netgear MR314 (previously worked OK with verizon DSL & Wetell Infospeed Modem)
Computer: WinXP - VIA Rhine II Ethernet Adapter

Computer Software properties
TCP/IP: Obtain IP address automatically; Use DNS servers 24.25.x.x (obtained from ipconfig when my computer is directly connected to the cable modem)
DHCP enabled.
Default gateways is empty.
"Automatic metric" box is checked.
"Append primary and connection specific DNS suffixes" radio circle is checked.
"WINS" has no addresses.
"Enable LMHosts lookup" is not checked.
"NetBIOS" is default.
"TCP/IP filtering" option is enabled, with checkbox in properties unchecked and "permit all" radio boxes checked.

Router Management
DHCP enabled
MAC spoofing of the physical address of the WinXP computer that is working when directly connected to the cable modem.
nc.rr.com is the domain
The username and password configured is the same username and password for Road Runner access.

All cables checked and power down sequence and power up sequences have been observed.

HELP!! I don't know what to do? Should I swap out and get an older Motorola Cable Modem? Is there an incompatibility with an older router (MR314) and a newer cable modem (SB5100)? Do I need a crossover cable between the router and the cable modem?

Thanks for any advice you can give me in advance.