java web start problem with sign file

Question

Unsigned application requesting unrestricted access to system
Unsigned resource: http://*/kis/adfjars/sqlj/lib/runtime12.jar

Exception:

    <jar href="http://*/kis/adfjars/jlib/oracle-el.jar" download="eager" main="false"/>
    <jar href="http://*/kis/adfjars/jlib/share.jar" download="eager" main="false"/>
    <jar href="http://*/kis/adfjars/lib/dms.jar" download="eager" main="false"/>
    <jar href="http://*/kis/adfjars/lib/xmlparserv2.jar" download="eager" main="false"/>
    <jar href="http://*/kis/adfjars/ord/jlib/ordim.jar" download="eager" main="false"/>
    <jar href="http://*/kis/adfjars/sqlj/lib/runtime12.jar" download="eager" main="false"/>
  </resources>
  <library-desc unique-id="null"/>
</jnlp> ]
    at com.sun.javaws.LaunchDownload.checkSignedResourcesHelper(Unknown Source)
    at com.sun.javaws.LaunchDownload.checkSignedResources(Unknown Source)
    at com.sun.javaws.Launcher.continueLaunch(Unknown Source)
    at com.sun.javaws.Launcher.handleApplicationDesc(Unknown Source)
    at com.sun.javaws.Launcher.handleLaunchFile(Unknown Source)
    at com.sun.javaws.Launcher.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

but when i deploy second time to oc4j then start working. Sometimes work for first time. Any idea why? All other files are signed only this file has problem, but not always.

Thx