Error Page

Hi everyone i have deploy my website on IIs but the problem is when i put 
<customErrors mode="On" defaultRedirect="~/ErrorPages/404.aspx" > <error statusCode="404" redirect="~/ErrorPages/404.aspx" /> <error statusCode="403" redirect="~/ErrorPages/403.aspx" /> <error statusCode="500" redirect="~/ErrorPages/500.aspx" /> <error statusCode="503" redirect="~/ErrorPages/503.aspx" /> </customErrors> Can someone help please