Well, if he's titrating with Phenolphthalein then he's already added too much base :P.
Hrmmm... Maybe not in the right USB (And by the right one, I mean version) slot? I had that problem with my computer for a bit.
---------- Post added 2012-12-27 at 05:22 PM ----------
And, just as I post this, all of them work... Fuck.