JSP -- how to pass a variable

Hi,
I am relatively new to JSP/Java and am currently trying to figure out how to pass a value gotten from running a query into another query.
My code is below .. I am trying to pass 'tsid'. For simplicity I have hard-coded some values. I have tried 2 different methods (c:set & String) and bolded them below. I wanted to pass the tsid into the sql2 query.
<%@ page import="java.sql.*"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%
    Connection connection = null;
    try{
        String tpid="1";
        String tdate="2005-11-11";
        String tsr01="3";
        String tsr02="54";
        String tsr03="64";
        String tsr04="90";
        String tsr05="54";
        String tsr06="17";
        String tsr07="null";
        String tsr08="null";
        String tsr09="null";
        String tsr10="null";
        String tsr11="null";
        String tsr12="null";
        String tsr13="null";
        String tsr14="null";
        String tsr15="null";
        String tz_1l1="111";
        String tz_1u1="111";
        String tz_1l2="111";
        String tz_1u2="111";
        String tz_1l3="111";
        String tz_1u3="111";
        String tz_1l4="111";
        String tz_1u4="111";
        String tz_1l5="111";
        String tz_1u5="111";
        String tz_2l1="111";
        String tz_2u1="111";
        String tz_2l2="111";
        String tz_2u2="111";
        String tz_2l3="111";
        String tz_2u3="111";
        String tz_2l4="111";
        String tz_2u4="111";
        String tz_2l5="111";
        String tz_2u5="111";
        Class.forName("org.postgresql.Driver");
        connection = DriverManager.getConnection("jdbc:postgresql:dbName","postgres","dbPassword");
        Statement stmt1 = connection.createStatement();
        Statement stmt2 = connection.createStatement();
        Statement stmt3 = connection.createStatement();
        String sql1="INSERT INTO t_test_setup_results (tsr_tpid, tsr_tester, tsr_athlete, tsr01, tsr02, tsr03, tsr04, tsr05, tsr06, tsr07, tsr08, tsr09, tsr10, tsr11, tsr12, tsr13, tsr14, tsr15, tsr_date) VALUES ('"+tpid+"' , '15', '9', "+tsr01+", "+tsr02+", "+tsr03+", "+tsr04+", "+tsr05+", "+tsr06+", "+tsr07+", "+tsr08+", "+tsr09+", "+tsr10+", "+tsr11+", "+tsr12+", "+tsr13+", "+tsr14+", "+tsr15+", '"+tdate+"' );";
     stmt1.executeUpdate(sql1);
     ResultSet rs2 = stmt2.executeQuery("SELECT tsr_id FROM t_test_setup_results WHERE tsr_date='"+tdate+"' AND tsr_tpid='"+tpid+"' AND tsr_athlete='9';");
        %>
     <c:set param="tsid2" value="${rs2.rows[0].tsr_id}" />
     <%
        String tsid="$rs2.rows[0].tsr_id}";
        String sql2="INSERT INTO t_test_zones (tz_tsrid, tz_1l1, tz_1u1, tz_1l2, tz_1u2, tz_1l3, tz_1u3, tz_1l4, tz_1u4, tz_1l5, tz_1u5, tz_2l1, tz_2u1, tz_2l2, tz_2u2, tz_2l3, tz_2u3, tz_2l4, tz_2u4, tz_2l5, tz_2u5) VALUES ('"+tsid+"', "+tz_1l1+", "+tz_1u1+", "+tz_1l2+", "+tz_1u2+", "+tz_1l3+", "+tz_1u3+", "+tz_1l4+", "+tz_1u4+", "+tz_1l5+", "+tz_1u5+", "+tz_2l1+", "+tz_2u1+", "+tz_2l2+", "+tz_2u2+", "+tz_2l3+", "+tz_2u3+", "+tz_2l4+", "+tz_2u4+", "+tz_2l5+", "+tz_2u5+");" ;
        stmt2.executeUpdate(sql2);
%>
     <result>success</result>
<%
    catch (Exception e) {
        e.printStackTrace();
%>
     <result>failure</result>
<%
    } finally {
        try {
            connection.close();
        } catch (SQLException e) {
%>this is the error I get with the above:
org.apache.jasper.JasperException: /my-apps/Peak/Jsp/submitNewTestData.jsp(64,1) Attribute param invalid for tag set according to TLD
org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:39)
org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:405)
org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:234)
org.apache.jasper.compiler.Validator$ValidateVisitor.checkXmlAttributes(Validator.java:989)
org.apache.jasper.compiler.Validator$ValidateVisitor.visit(Validator.java:710)
org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:1441)
org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2163)
org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2213)
org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2219)
org.apache.jasper.compiler.Node$Root.accept(Node.java:456)
org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2163)
org.apache.jasper.compiler.Validator.validate(Validator.java:1489)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:157)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:286)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:267)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:255)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:556)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:296)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:245)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

OK,
here is what I currently have:
%>
     <c:set var="tsid2" value="${rs2.rows[0].tsr_id}" />
     <%
        String tsid= tsid2;
        String sql2="INSERT INTO t_test_zones (tz_tsrid, tz_1l1, tz_1u1, tz_1l2, tz_1u2, tz_1l3, tz_1u3, tz_1l4, tz_1u4, tz_1l5, tz_1u5, tz_2l1, tz_2u1, tz_2l2, tz_2u2, tz_2l3, tz_2u3, tz_2l4, tz_2u4, tz_2l5, tz_2u5) VALUES ('"+tsid+"', "+tz_1l1+", "+tz_1u1+", "+tz_1l2+", "+tz_1u2+", "+tz_1l3+", "+tz_1u3+", "+tz_1l4+", "+tz_1u4+", "+tz_1l5+", "+tz_1u5+", "+tz_2l1+", "+tz_2u1+", "+tz_2l2+", "+tz_2u2+", "+tz_2l3+", "+tz_2u3+", "+tz_2l4+", "+tz_2u4+", "+tz_2l5+", "+tz_2u5+");" ;
     stmt2.executeUpdate(sql2);NOW I get sucess (which is what it should be) OR that tsid2 could not be resolved. Why the back and forth errors? is it a timing thing? (ie it sometimes takes longer to query the database?? )
If it is a timing thing, how can i fix this?

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