Virtuemart and K2 errors

Hi, I'm facing errors on K2 articles and on virtuemart with template "myStore".

On K2 the articles are giving errors and sometimes the page in blanc. And on Virtuemart I can't pass to the next product page. Ej. If I'm checking a category with 50 produts I see a page with 20 productos and I clic the arrow or the nr. of the next page, I get an error and go to Home. Anyone knows how can this be solved?

I have the page on a dedicated server

Please provide us link to your website.
It's pretty difficult to imagine what's wrong.

Hi, and thank you for reply.

Here i sthe lint to the web site http://www.tiendadeldetective.com

Please comment. Thanks