These are my conn details as they appear in Windows.

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel(R) PRO/100 VE Network Connection
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv4 Address. . . . . . . . . . . : 10.0.xx.xxx(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 10.0.xx.x
DNS Servers . . . . . . . . . . . : 10.0.xx.x
NetBIOS over Tcpip. . . . . . . . : Enabled

I selected static ip configuration(in manual configuration) in Ubuntu and entered my ip, subnet mask, Gateway and dns server. For using the internet i need to log on to the gateway using my browser.
But whenever i open firefox and try connecting to "http://10.0.xx.x" it says "The site you have entered seems to be valid but firefox cannot connect to the server at ........ ".
But i can see other computers connected to the network when i open "Places/Network". But firefox doesn't seem to work.

I saw another post in the forum and tried

/etc/rc.d/rc.inet1.conf

/etc/resolv.conf

sudo /etc/init.d/networking restart

But all it says is "Unable to resolve host at ....... ."

What am i doing wrong. Am i missing something ???
Any help would be appreciated.