Page using C#, All Valdtrs excpt Custom will trigger MessageBox, why?

[other3]

I developed a page that uses every type of validator and has a ValidationSummary that shows a MessageBox. Unlike most of the code I've seen I used the IDE to develop the page. All of the validators, including the Custom one will show their error messages on the page when the post link is clicked, but all the validators except the Custom one will show in MessageBox.

Would really appreciate some insight into this.

Everything I know I learned from The Grateful Dead and Buffy The Vampire Slayer
Charlie