I'm sorry if my english is so bad - i'm from brazil, but i need a help that i can't find anywhere!
My phone simply doesn't login on my google acount anywhere! I can't login from market or from the configurations, i don't know what to do!!!! Could you, please, help me? I have the internet pack and the browser and everything works but the app market and the apps that need internet don't ((

Hmm...are you sure you have entered in the password correctly for the Gmail account you want to use? You should go to Gmail.com to make sure that your able to login that way.

TRY THIS

LOG IN GMAIL ACCOUNT > click ACCOUNT SETTINGS> in personal settings there is AUTHORIZING APPLICATION & SITES select>enter your gmail PASSWORD>In that name text box enter your name and click GENERATE PASSWORD>then enter that password in your andriod phone and login.

there may br two reasons behind, if its actually happening!
First any of your username or password might bt wrong
else
You might be get banned. If you think both reasons are not valid in your case., You may contact admin about it.