Validations not firing if image button is having OnClientClick in RadGrid

Hi All,

I am using telerik grid and form settings in it. I have a javascript function lets say WrongValidation() which i'm caling on imagebutton onclientclick event like OnClientClick="return WrongValidation();" and CauseValidation="true". the WrongValidation() function will validate two textboxes and I have dropdowns and some other textboxes with respective required field validators in that form settings in radgrid. when i click on button the other validations are not firing. if i remove the onclientclick then other validations are firing

help me

Thanks in Advance