Php5 issue

[Hernan]

Hi everybody,
I´m having a problem with a client´s website. It was running in a server on php4 (MICFO.com) and now they´ve updated their servers and the site has become completely broken everywhere.
The site is Velas de la Ballena. You may try browsing it and will see what I´m talking about.
I was told there was a patch for this issue... Does anybody know anything about this?
The error is this:
1054 - Unknown column 'p.products_id' in 'on clause'

select count(p.products_id) as total from products_description pd, products p left join manufacturers m on p.manufacturers_id = m.manufacturers_id, products_to_categories p2c left join specials s on p.products_id = s.products_id where p.products_status = '1' and p.products_id = p2c.products_id and pd.products_id = p2c.products_id and pd.language_id = '3' and p2c.categories_id = '26' ORDER BY pd.products_name ASC

[XT SQL Error]

Thanks in advance!

Kind regards,
Hernán