i see alot of problems with toshiba laptops, 9 times out of 10 there is a patch for it on the site, either bios or the controller software. i looked up the model you listed, they make several different ones, so you will have to look it up to make sure you get the correct ones. laptops have several third party controllers so it is a possibility this is your problem. they list the drivers in a odd way, make sure you get the newest one for each item. updates from other software programs, even xp cause glitches with the orriginal versions of what came with your laptop.
http://www.csd.toshiba.com/cgi-bin/t...ghdgngd gll.0
they also have very good tech support and toll free numbers.
on the communications link on the link above you can find several ways to contact them.