Adding custom subpanel in Accounts module.

I am adding two sub panels in the accounts detail view to list out the opportunities (Closed Won and Closed Lost ) . But when I check the accounts detail page it shows only one of my sub panel(Closed Lost)

Below is my code


$layout_defs['Accounts']['subpanel_setup']['opp_closed_won'] = array(
    'order' => 50,
    'module' => 'Opportunities',
    'subpanel_name' => 'ForAccounts',
    'get_subpanel_data' => 'function:get_closed_lost_closed_won_opportunities',
    'generate_select' => true,
    'title_key' => 'LBL_OPPORTUNITIES_WITH_CLOSED_WON',
    'top_buttons' => array(),
    'functions_parameters' => array(
        'import_function_file' =>
            'custom/modules/Accounts/customOpportunitiesSubpanel.php',
        'sales_stage' => 'Closed Won',
        'account_id' => $this->_focus->id,
        'return_as_array' => 'true'
    ),


);

$layout_defs['Accounts']['subpanel_setup']['opp_closed_lost'] = array(
    'order' => 49,
    'module' => 'Opportunities',
    'subpanel_name' => 'ForAccounts',
    'get_subpanel_data' => 'function:get_closed_lost_closed_won_opportunities',
    'generate_select' => true,
    'title_key' => 'LBL_OPPORTUNITIES_WITH_CLOSED_LOST',
    'top_buttons' => array(),
    'function_parameters' => array(
        'import_function_file' => 'custom/modules/Accounts/customOpportunitiesSubpanel.php',
        'sales_stage' => 'Closed Lost',
        'account_id' => $this->_focus->id,
        'return_as_array' => 'true'

    ),


);

Please help me to sort it out

Thanks!