How do you get past the dragon in Chapter 7 part 2, mission 1?

You find a bell-bike then wingardean
-leveosa the rest of it and ring the bell.

It doesn't work... I can't send wingardean when on bike...
How do you manage it?
Thx

Use the bick n bell go up near the dragon n ring the bell continuosly n when the dragon covers it's ears go to the exit.

First you use the deluminator with ron and griphook to move the light to the left hand chain. Lower the original light with griphook, take the light with ron's deluminator, then make sure griphook raises it back up so the light by the chain is on the ground. Light the one at the chain with the deluminator, then have griphook go to the original one and lower it so that the one by the chain will raise up. Then you break the chain apart.

The next thing you do is build the bike. Don't worry about the right hand chain, you can't do anything with it untill later. Once the bike is built ride a row of coins will appear that will lead you to the next room. You have to ride up to the dragon on the bike ringing the bell untill it covers it's ears, the hurry to the exit that was shown by the coins, hop off the bike and go through the archway. If the trail of coins is gone, it's the only archway that the dragon wont let you go through withough shooting fire your direction.

I had the same problem and was stuck for ages. However I looked around on the internet and found that this problem is some sort of gilth so when you make the little bike and then switch the lights on the left side using the deluminator, if you switch lights against or even let the dragon blow you up you have to resart this level again. Anyway this is what you need to do step on the little brown stone so the bulb crashes down then move the two piece's by the bike then make the bike, go right up to the dragon ring the bell on the bike so the dragon covers it's ears. While it's doing that follow the studs that appear into the side room. First take the light from the lamp near the entrance then do the rest of the stuff in the room, when has filled up with tresure jump aroung to the cup send the light you took ealier into the lamp in front of you,then slide back down to the entrance.(REMEMBER IF YOU REJIGHT ANY LAMPS AGAIN OR MESS WITH THE LAMPS IN THE DRAGON CHAMBER ON THE LEFT SIDE YOU WILL HAVE START AGAIN) exit this room and go back into the dragon chamber , when entering the dragon chamber you should be shown the chest on the right side turn into hammer piece's, go back to the bike and scare the dragon again then go to the hammer and put it together levitate it to smash the lock on the chain then jump right next to the chain so it looks like your hangin of it the you should get the option to move the pins at the top of the chain the chain will then come lose. Get back on the bike it shouldent matter if the bike gets blown up now but be carefull that you don't,scare dragon move pins on left side dragon should now escape( try doing the chain whilst holding the cup remember you can't ride the bike whilst holding the cup)

Hope this helps.