Computer Networking connectivity

Windows XP Home
intel Pentium IV 2.4 GHz
half a Gig RAM
Generic Nic Card
Comcast Cable

I recently subscribed to Vonage service. I have the Linksys/Vonage Router VoIP Modem (2 in one) I was never able to have the computer and the Telephone on at the same time. I have the motorola surfboard cable modem and here is what I have done:
I have cloned the MAC address of my PC for the router
I have tried to change all the old TCP/IP settings of my PC
When I connect the Pc to the router I have no Connection to th enetwork, I have tried the settings of ther router,I have no problem with the Vonage phine service, and with another computer getting on the internet. It is the home PC XP issue. I keep getting the message: This connection has limited or no connectivity.... I can't Access the Router setup
netdiag /test:winsock found no errors
netsh int ip reset c:\resetlog was successful
Reinstalled (TCP/IP)
ipconfig /renew sometimes is unable to renew the ip
DHCP is enabled

When I enter the 192.168.15.1 (Which I am sure is the correct ip because I have accessed it with my laptop) IE error: Could not find this search page...

The only thing I can think of now is to uninstall McAfee Virus and firewall and all that jazz and redo everything from scratch, Then I was thinking of doing a recovery installation of XP, Am I missing something? Please Help!!!!!

 

Have you tried the Vonage forums?
http://www.vonage-forum.com/forums.html

 

Thank you for the post, I didn't have to go through extreme measures! I installed a new NIC card and everything works Dandy!!!!!! Now I want to test The OLD NIC card. It was XP driver issue so I'm going to mess around a little with the driver!
Thanx again