FormComponent with Validate

Hello,

i develop a form component with IValidator in SharePoint 2010. As with migrate to SharePoint 2013 i must update my code. And i have a Problem in the 'Validate' method in the form component.
In SharePoint 2010 i get in the object this.ListItem the values. But in SharePoint 2013 i get in These object the old values and i found no possibility to get the new values.

Have someone a tipp?

Greeting Joerg Welters