Dogboy,
Don't let it worry you, i do great writing the sentences down correctly all week, go to class, my Tutor asks me one of the questions in Russian and i go all brain-dead.
Speech is the hardest part for me, even though i have a number to tapes,i still forget stuff i've learnt when i am put on the spot. I wish i could find a way to recite it more easily. These tapes get repetitive after a while.