[TYPO3-mvc] Query greaterThanOrEqual / lessThanOrEqual not working

[Alexander Dick]

Hi everybody!

I have a listing of records, and on top of that I made 2 input fields to 
specify a date range.

For that I implemented a repository method findByDate():

/**
  * @param integer $dateFrom Start date timestamp
  * @param integer $dateTo End date timestamp
  */
public function findByDate($dateFrom, $dateTo) {
	$query = $this->createQuery();
	return
		$query
		->matching(
			$query->logicalAnd(
				$query->equals('deleted', 0),
				$query->equals('is_complete', 1),	
				$query->greaterThanOrEqual('date',$dateFrom),
$query->lessThanOrEqual('date', $dateTo)
				
			)
		)->execute();
}

the date field is of type integer and holds a timestamp.

The problem is that no results are returned as soon as I add 
greaterThanOrEqual or lessThanOrEqual.

I also debugged the query, and everything looks fine.
Even when I paste it into phpmyadmin the correct results are shown.

Any clues?

Thanks
Alex