I've had similar problems when I used to use my old Vaio laptop.
Mine was a problem with how many application/processes at first, then it didn't seem to want to work at all--seems the reader VSCEL (vertical cavity surface emitting laser) eye was the littlest bit dirty. Usually a Q-tip and alcohol G-E-N-T-L-Y (can't emphasize that enough) used will work though you really should try blowing dust off of it first.
Then there is the matter of firmware or cheap manufacturing/buggy compatibility. Usually not a problem with Toshiba... unless they decided to go cheap on manufacturing. My only suggestion in this unlikely case is replace with new unit, possibly of a different brand. Though in a laptop this can quickly get to be more of a hassle than it's worth.
Otherwise I don't really know what else to tell you.
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