Issue with jnlp

Below is the jnlp code that i have in the jnlp file:

<?xml version="1.0" enconding="utf-8"?>
<jnlp spec="1.0"
            codebase="myurl"
                    href="path to jnlp on web server">
      <information>
            <title>Some Title</title>
            <homepage href="homepage url"/>
            <vendor>Vendor name</vendor>
            <description> Some Description</description>
            <offline-allowed/>
      </information>
      <resources>
            <jar href="/folder/jar1.jar"/>
            <jar href="/folder/jar2.jar"/>
            <jar href="/folder/jar3.jar"/>
            <jar href="/folder/jar4.jar"/>
            <jar href="/folder/jar5.jar"/>
      <resources>
      <security>
            <all-permissions/>
      </security>
      <application-desc main-class="My Main class"/>
</jnlp>

Some reason I'm getting this error when trying to run it:

MissingFieldException[ The following required field is missing from the launch file: <jnlp>(<application-desc>|<applet-desc>|<installer-desc>|<component-desc>)]
      at com.sun.javaws.jnl.XMLFormat.parse(XMLFormat.java:110)
      at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(LaunchDescFactory.java:46)
      at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(LaunchDescFactory.java:58)
      at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(LaunchDescFactory.java:112)
      at com.sun.javaws.Main.launchApp(Main.java:182)
      at com.sun.javaws.Main.main(Main.java:136)

but i have the <application-desc on the next to last line.

Anyone know what the problem may be? Thanks
LVL 5
tbboyettAsked:
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CEHJCommented:
main-class should be a fq class name, e.g.

<application-desc main-class="edu.psu.geovista.studio.GvStudio">

..................
tbboyettAuthor Commented:
This is how i have it, but don't understand why it throws the error
<application-desc main-class="mypackage.mainclass">
tbboyettAuthor Commented:
Ok, the problem for that error was i forgot the / on the ending </resources>

but now i get another error stating No JRE version found in launch file for this system.

Do i need to somehow specify which JRE to use?
gauravkrtomarCommented:
<resources>
    <j2se version="1.4.2"/>
    <jar href="xyz.jar"/>
</resources>

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gauravkrtomarCommented:
The following explains the j2se element...........

The j2se element specifies what Java 2 SE Runtime Environment (JRE) versions an application is supported on, as well as standard parameters to the Java Virtual Machine.  If several JREs can are specified, this indicates a prioritized list of the supported JREs, with the most preferred version first.  For example:

       <j2se version="1.3" initial-heap-size="64m"/>
       <j2se version="1.4+"/>

The version attribute refers, by default, to a platform (specification) version of the Java 2 platform. Currently defined platform version are 1.2, 1.3, and 1.4. (A platform version may optionally contain a micro version number; e.g., 1.4.2.)

Exact product versions (implementation versions) may also be specified—e.g., 1.3.1_01 or 1.4.2-beta by Sun Microsystems, Inc.—by including the href attribute. E.g.,

    <j2se version="1.3.1_01" href="http://java.sun.com/products/autodl/j2se"/

    or

    <j2se version="1.4.2-beta" href="http://java.sun.com/products/autodl/j2se"/>

If a platform version is specified (i.e., no href attribute is provided), Java Web Start will not consider an installed non-FCS (i.e., milestone) JRE as a match. E.g., a request of the form

    <j2se version="1.4+">

would not consider an installed 1.4.1-ea or 1.4.2-beta JRE as a match for the request. Starting with 1.3.0, a JRE from Sun Microsystems, Inc., is by convention a non-FCS (milestone) JRE if there is a dash (-) in the version string.
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