My default gateway is 0.0.0.0 how to solve it??

I saw that my default gateway is 0.0.0.0 instead of something else.How to change this??Why i am getting like this?

My ipconfig

PPP adapter Broadband Connection:

Connection-specific DNS Suffix . :
IPv4 Address. . . . . . . . . . . : 123.201.64.187
Subnet Mask . . . . . . . . . . . : 255.255.255.255
Default Gateway . . . . . . . . . : 0.0.0.0


Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Autoconfiguration IPv4 Address. . : 169.254.236.236
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . :

I am using YOU broadband.

Many providers mask the wan default gateway in this fashion for security reasons.btw why do u need it ?
However there seems to be an issue with your LAN ip settings.seems your pc is not getting it via dhcp.