[Roel]

Well I have took a further look, but you are using a old version of mysql plugin, which is not a problem, but im not really familiar with it, but I have looked at the wiki and should use this;
while(mysql_retrieve_row())
then inside the while use mysql_fetch_field_row
Take a look at
https://sampwiki.blast.hk/wiki/MySQL#mysql_retrieve_row

There is more here.