[Resolvido] probema no upload

estou usando o seguinte codigo pra upload

class IndexController extends Zend_Controller_Action {

public function init() {
	/*
 * Initialize action controller here
 */
}

public function indexAction() {
	echo '<form enctype="multipart/form-data" action="/index/upload" method="POST">
 <input type="hidden" name="MAX_FILE_SIZE" value="100000" />
 Choose a file to upload: <input name="uploadedfile" type="file" />
 <br />
 <input type="submit" value="Upload File" />
</form>';
}

public function uploadAction() {
	$adapter = new Zend_File_Transfer_Adapter_Http ();
	mkdir('temp');
	$adapter->setDestination ( 'temp/' );

	if (! $adapter->receive ()) {
 $messages = $adapter->getMessages ();
 echo implode ( "\n", $messages );
	}
}

}

so q ao upar arquivos eles vao com o tamanho (em kb) certinho, mas corrompidos, o q fazer? imagens nao abrem, nao sao, nao podem ser visualizadas...