使用xval进行C＃mvc2客户端表单验证，防止发布

I'm using xval to use client side validation in my asp.net mvc2 web-application. Despite the errors it's giving when I enter text in a numeric field, it still tries to post the form to the database. The incorrect values are being replaced by 0 and saved to the database. But instead it shouldn't even be possible to try and submit the form. Can anyone help me out here? to use client side validation in