I'm trying to teach Chloe to read, but we are having a tough time. We started with sit, I printed out a piece of paper that had SIT in giant letters on it. I held up the card, then said sit, then rewarded. She learned within 5 minutes that me holding up the paper meant sit. Unfortunately, she paid no attention what was on the paper. When I tried to teach her the lie down card, she didn't understand the difference. I held up the card, and she immediately sat. I told her to lie down, and she did. Within 5 minutes she understood that me holding up the card meant lie down. I thought we were getting somewhere, but when I held up the sit card, she lied down. Any ideas as to what I should do?