Changing routes not working in Win7, but do in WinXP

I have a Windows 7 RC 7100 and have a problem with changing routes on it here at work.

We have 3 gateways

10.1.1.1 - default gateway via DHCP for internet browsing
10.1.1.2 - Backup
10.1.1.3 - highspeed for site-to-site connections
(not real addresses)

When I do the command;

route add 0.0.0.0 mask 0.0.0.0 10.1.1.3

It says OK

When I do the command;

route delete 0.0.0.0 mask 0.0.0.0 10.1.1.1

It says OK

However, I can no longer ping the internet.

If I subsequently do (i.e. revert to the Default Gateway)

route add 0.0.0.0 mask 0.0.0.0 10.1.1.1

It works again.

If I do these exact same commands on Windows XP they work ?!?!?

Has windows 7 made some more changes to the networking that I do not know ?

Yes ... ran it as administrator

I experience the same problem. Worked fine under XP, what's wrong with 7?!?!?

I think i found an answer to this, anyone still here that cares to know?

try adding an interface option (from the COMMAND prompt run as administrator) at the end of the "route add" command, for example "IF 1" assuming IF 1 is your primary NIC, and let me know if that works or not.

it would look something like this:

route add 10.10.10.0 mask 255.255.255.0 192.168.1.1 IF 1
(add -p at the end if you want to make it permanent otherwise it will lose the route after the next reboot)