Do some reading here in the Brisket forum, sounds like you've not sure of what temp to smoke it too, how to trim or how to test for doneness.
Check out Brisket 101 first (its off the main page).
For temp, you use the temp as a guide, but only a guide, it could be perfect at 195 or might have to go higher. Read about the Poke and Prode method to help determine doneness.
There are just so many things about a brisket, do a little reading and when you have questions (and you will) come on back and we'll try to clarify.
Smokin'