Web page not display

I have this problem of connecting to our ISP web page .I suscribe to isp through dial up connection. each time i initialize a connection the system faled to show any web page mean can not connect to internet.
I checked the modem connection and installation these were okay,talk with the technical representative of the ISP to solve the problem no show . i run windows 2000 professional on the pc.
can somebody tell what is responsible for this problem of connecting to net.