Speech Recognition & Print Issues

Hi,
When using the speech recognition software in ms word, ifI try to correct a
word by giving the 'correct', command followed by the word I wish to correct,
it simply just types what I say rather than actually carrying out the correct
function. For some reason it seems to operate correctly when writing emails.
Has anybody got any idea why this should be happening.

Also since installing Vista Ultimate, every time I print a document the
program seems to default to Letter sized paper and I have to manually adjust
the settings to A4. Is there a way to change this default setting please.