Application_error in global.asax not catching errors in webapi

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C#3.5

WebAPI

In my Project,we are handling WEB API exceptions in Global.asax file (redirecting to Error page if any error occurs).
Its working fine when i run in local.Its not working if i deploy the code in the server.

protected void Application_Error(object sender, EventArgs e)
        {
            Response.Clear();

            Response.Redirect("~/Error.aspx");
            // Clear the error from the server
            Server.ClearError();
        }

web.config changes

<customErrors mode="Off"/>

Is there any other way we can redirect it to error page.
Please let me know how to fix it.

Thank you all in advance

What I have tried:

I tried to implement some changes like Changing IIS7 server into classic mode and others