Ripping Problem

[p16file]

I'm using teraterm with dreamrip and a serial cable.

Whenever I try to rip a game, it goes extremely slow, about 16k a minute and usually when I get to about 375k, I get weird symbols in the TTerm window. This happens when I'm trying to rip MvC2 and Soul Calibur. However, this doesn't happen when I try to rip Skies of Arcadia.

I've tried using HyperTerminal, defragmenting my disc, and using Rambooster and nothing works.
Can someone help?