AppManager update on GUI-less linux server

Hi,

I was just trying to install the latest AppManager service pack but the updateManager.sh script complains like this:

---snip---

# sh ./updateManager.sh
Exception in thread "main" java.awt.HeadlessException:
No X11 DISPLAY variable was set, but this program performed an operation which requires it.
at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:159)
at java.awt.Window.<init>(Window.java:310)
at java.awt.Frame.<init>(Frame.java:419)
at java.awt.Frame.<init>(Frame.java:384)
at javax.swing.JFrame.<init>(JFrame.java:150)
at com.adventnet.tools.update.installer.UpdateManagerUI.<init>(UpdateManagerUI.java:1051)
at com.adventnet.tools.update.installer.UpdateManager.init(UpdateManager.java:115)
at com.adventnet.tools.update.installer.UpdateManager.main(UpdateManager.java:346)

---snip---

???

Please, don't tell me that I need a working X11 on the server just to apply a service pack!

Regards
Ingmar