shot me - html isn't decode - WHY?

[eluser]Jan_1[/eluser]
getting really mad... could you please help me?

my input in input field is ' ö ' for example.
so I get an ' & o u m l ; ' in my db-table-field. that's correct.
but I don't get it decoded back. not with or without html_entity_decode().
it just gives me ' & o u m l ; ' back.
am I blind? why that suddendly?

view

Code:

<?php echo html_entity_decode($profil->detail); ?>

view form

Code:

<input type='text' name='detail' value="<?php echo set_value('detail', $profil->detail); ?>">
<?=form_error('detail')?>

model

Code:

$update['detail'] = htmlentities($this->input->post('detail'));

db

Code:

`detail` text collate utf8_unicode_ci NOT NULL,

PHP-Version: 5.2.6