automatic connection to internet

Hi Folks

When I open a web browser and type in a web address I cannot get connected to the internet automatically.
I have set up my provider account details with the internet connection wizard using an existing account that I set up with Windows, so the details are correct.
I can however connect to the internet using wvdial followed by my connection name.

Some details- 
IP is freeserve
dist is RedHat 7.3
modem is a lucent winmodem
modem driver is ltmodem from source

I have noticed that if I use the enable at boot setting the computer hangs at startup when it tries to start ppp0, and when I try to activate my connection in network configuration.

Could someone please point me in the right direction ?

I will of course supply any config files that people need.

Thankyou in advance

Rich