You cannot execute a SQL Server store procedure from client-side code running in the browser.
You will need to postback to the server and have code in the ASPX page execute the stored procedure.
You shouldavoid usingServer.CreateObject in ASPX code. If you find example code for using Server.CreateObject it will be for Classic ASP not ASP.NET.
You absolutely should not use ADODB from with in .NET code. Use classes in System.Data.SqlClient to perform operations on SQL Server. Also review the SqlData controls in the System.Web.UI.WebControls namespace.
I would also suggest you take the time to run through some of the ASP.NET quickstarts and tutorials.