Error 500 when want to edit Orders en Woocommerce

Hi, I have woocommerce 1.6. I can’t acces to orders in the dashboard. I can see the order, procces ir, complete it, etc but when i try to enter to anyone nothing happens and the explorer show Error 500, internal problems with the server or something like that. I have another blog with woocommerce with the same server and evrythings run ok. Any idea?