Redirect when a user uses the wrong credentials

HOw can I redirect a user to a custom page when he/she uses the wrong credentials / password. No I get the 500 page.
I make use of the K2 login module.

Thanks!!

If the K2 module don't have this feature in module settings probably the only way is to modify module code but this changes are beyond our support. Probably more details about K2 code modifications you will find on K2 support forum.