product page problem.

[ds_lite]

Hi guys,

i've a problem with the product page...

it gives me this error: Catchable fatal error: Object of class Product could not be converted to string

On http://www.bottegastregata.it/product.php?id_product=11

Why this? :S

and why on other products... i can't see anything: http://www.bottegastregata.it/product.php?id_product=33

:S help me.. i have 1.4 prestashop cms with Smarty 2