Vista Dialup Networking

When I Power up my Gateway PC with Vista, It insists on dialing up my
internet connection. I only have acess to dialup, no DSL or Cable in my
area and I only
have 1 phone line. If I set Never dial a connection, I can't connect to my
ISP,
& if I set Always dial up my default connection, It dials out every time I
power up.
Also, Sleep does not work on this PC. After a few hours, It won't wake up
& I
have to power it down & restart. This is really getting irritating. Does
anyone have a solution.
Thanks