Confused with Custom Validation

I have got four different Custom Validator controls on my page.

Each one's ServerValidate event is called on the click of four different buttons in which i do assign the args.isValid = True/False accordingly.

But whenever i click any button all four ServerValidate event is called. Anyway I have put the whole code inside (If Page.isValid = True Then).

But each button doesnt call its own Validator's event. All four are called in the same sequence.

Pls suggest.

Thanks

If a controls validator events will be called at the same time if it has multiple validators, because it loops through the validators assigned to the control.