Lan driver

Hello,
'm having problem with my network!
windows say
Limeted or no connectivity.
you might not able to access internet or some network resourcess.
this problem occurred because the computer did not assign a network address to the computer.....

computer specification
operating system: windows xp profesional
system manufacturer: ecs
system model: geForce 6100 pm-m2
BIOS: phoenix-award bios Work station BIOS v6.00pg
procesor amd sempron(tm) procesor le-1250,mmx
memory: 894ram
direct x version: direct X 9.0c(4.09.0000.09.4