I have a Revision B iMac with the internal 56k modem. Lately I cannot stay connected to my ISP (worldspice) for more than a few minutes. I've tried it with different phone lines, even from different cities and the result is the same. Very slow connection that gets terminated in a few minutes. I havent called the ISP yet, wanted to see if it's on my end first. Anyone have a clue what I might be doing wrong?