help, i just bought an ibook clamshell and i'm trying to connect to netzero via dialup. i connected it to my phone line with a filter but it always says there's no dial tone. i pick up the phone and there's surly a dial tone. i took off the filter and kept my dsl modem on. when i tried to connect to dialup i still got a no dial tone message BUT my dsl modem went offline so obviously there's some activity on the phone line. what's going on? does someone have a resolution?