In reply to Jimbob123: If you still have your old shoes try to wear them for part of each climbing session. Then gradually phase out wearing you old shoes. i.e.
Week 1: Wear old shoes for 80% of each session
Week 2: Wear old shoes for 60% of each session
Week 3: Wear old shoes for 40% of each session
Week 4: wear old shoes for 20% of each session
Week 5: Stop wearing old shoes