Help with 'Head Down' Problem!

[Halter~Shower]

Ahrg. i know I have a pony but she should know better than ' putting her head down'. Even when I'm trotting! She puts her head down and I gp with her. I ride ENGLISH so I have no clue how to get some twine on the bit and tie it like you can do with a western saddle. I have no idea what to do. I am thinking about changing the bit. She has a TWISTED WIRE bit. She was fine with a plain 2 piece bit. Then we changed bit and she put her head down. She is also trying to bite through the bit. i don't know if this is a health problem or just 'her'. I have told mom to get her teeth looked at because i thought "Is it her teeth? It's like us when we have a cavity. It hurts when we chew on mettal and stuff. Coukd she have a sensative tooht?" Okay, I might of been day dreaming but I don't think so! Okay, I need you're help with this one. WHAT SHOULD I DO? I can give out more detials and answer most questions on this topic. Thanks Alot!:)

[galadriel]

A twisted wire bit is uncomfortable and unpleasant for the horse. Why did you change? That would well be the reason why she is pulling her head down.

[Halter~Shower]

The reason why we changed is because she was being REAL bad.

[galadriel]

Have you got an instructor working with you?

[Halter~Shower]

Yes, she said loosen up on the reins. i did. Ya no what happend? I couln't trot or do anything!

[Calsanjo]

It sounds like the bit is hurting her. When you say she was "being real bad" before you changed it, what exactly was she doing? Because it sounds like a change of bit wasn't the answer.

If you could provide some more details we might be able to help! :)