ASP.NET Custom Validator Client side & Server Side validation not firing

Question

This has not happened to me before, but for some reason both the client and server side validation events are not being triggered:

Answer 1

Thanks for that info on the ControlToValidate LukeH!

What I was trying to do in my code was to only ensure that some text field A has some text in the field when text field B has a particular value. Otherwise, A can be blank or whatever else. Getting rid of the ControlToValidate="A" in my mark up fixed the issue for me.

Cheers!