我的版本低,"RED HAT 网络警告通知工具"提示有更新,但UP2DATE提示版本低,我把UP2DATE升级以后,起动UP2DATE,还是出现错误.无法下载更新软件包,请问是什么原因?Error Message: Service not enabled for system profile: "SKY11132"Error Class Code: 31Error Class Info: This system does not have a valid entitlement for Red Hat Network. Please visit https://rhn.redhat.com/network/systems/entitlements.pxt or login at https://rhn.redhat.com, and from the "Systems" tab, select "System Entitlements" to enable RHN service for this system.Explanation: An error has occurred while processing your request. If this problem persists please enter a bug report at bugzilla.redhat.com. If you choose to submit the bug report, please be sure to include details of what you were trying to do when this error occurred and details on how to reproduce this problem.

我的也是这个问题，解决不了，不知道有没有高手来解决一下