mysql error UPDATE dont work

[manola]

Hello!

I am using $vbulletin->$db->$query_read many times with no problems but I can not use $vbulletin->$db->$query_write.

Here is the sentence

Code:

PHP Code:

$vbulletin->$db->query_write("UPDATE cesta_numeros SET iduser = $idnom WHERE num = $mirado"); 


Variables $idnom and $mirado works and have true values.

If I open my custom vbulletin page without this sentence, all works fine but if I use it I see a beautiful white page without any code.

What's wrong?

I am using this sentence and works fine

Code:

PHP Code:

$leecompra = $vbulletin->db->query_first("SELECT iduser FROM cesta_numeros WHERE num=$mirado LIMIT 1"); 


Thanks