I always had a similar problem typing in pie. I would hit the homepage button, which is just below the spacebar.
Thats when i decided a kb would be a good thing to get. But, you can try typing the message in a notepad program, like
this free one. I use this program, and it keeps whatever u have, even if u dont save it, and ur axim freezes up. I never lose data in it.
Then just copy and paste ur finished product.