Im not sure if someone mentioned it yet. But latest 1.4.4 still has the random "crashes" for me. Meaning bot suddenly gets unresponsive for a few seconds, useally in aoe and it rips.
Sounds like something is effed up in your db install. Or your computer just isn't handling d3 + bot well enough. Reinstall the bot from scratch (ie new folder, new downloads, etc. DO NOT port in any of your old crap). Also, update all your drivers - graphics, sound, mobo, etc.