$form['#submit'][] not working for login block

Hi,

I am trying to customize default login process, and i am using following code:

case 'user-login-form':

$form['name']['#title'] = t('User Code');
$form['name']['#description'] = t('Enter your user name or e-mail address.');
$form['pass']['#description'] = t('Enter the password that accompanies your e-mail.');
$form['name']['#element_validate'][] = 'mymodule_user_login_validate';
$form['#submit'][] = 'mymodule_user';
break;

case 'user_login_block':
$form['name']['#title'] = t('E-mail');
$form['name']['#element_validate'][] = 'mymodule_user_login_validate';
$form['#submit'][] = 'mymodule_user';
break;

The issue is that $form['#submit'][] is not working for user_login_block, if i try to put:
$form['#action']='user';

It redirects to login form, which i don't want.

Please suggest me a solution for this!

Thanks,
Kul.