Wish I knew what "Twain capabilities" meant
It means how fast the Twain weaches before it wuns over that wascally wabbit.
Seriously, had a similar problem, when you press scan on the scanner, the cannonscan toolbox will appear, try scanning with scan2 option, on my pute it opens the document in adobe photoshop, from here you can save as whatever ,seemed to work for me.
good luck
