forms - I have a really confusing issue with checkboxes -

i have problem value checkboxes returns me: first of start 2 variables:

 $blabla_severity_levels =    variable_get('blabla_severity_levels', array());   $blabla_severity_options = array(); 

then make each watchdogs:

   foreach (watchdog_severity_levels() $severity_numbers => $severity) {        $blabla_severity_options[$severity_numbers] = check_plain(drupal_ucfirst($severity));    } 

then generate form:

$blabla_form['blabla_severity_levels'] = array(       '#type'          => 'checkboxes',       '#title'         => t('type of log messages'),       '#options'       => $blabla_severity_options,       '#default_value' => array_values($blabla_severity_levels),       '#required'      => true,     ); return system_settings_form($blabla_form); 

and in function call like:

$severity_levels = variable_get('blabla_severity_levels', array()); 

now if make dpm($severity_levels) gets me out array

error (string, 5 characters ) error warning (string, 7 characters ) warning emergency (integer) 0 alert (integer) 0 critical (integer) 0 notice (integer) 0 info (integer) 0 debug (integer) 0 

but needing blabla_severity_options is:

error (string, 5 characters ) 3 warning (string, 7 characters ) 4 emergency (integer) 0 alert (integer) 0 critical (integer) 0 notice (integer) 0 info (integer) 0 debug (integer) 0 

i want save values...... ideas plz?? need help