Jmol applet in Sage 6.3 cannot load

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Hi,

I am going trough the Tutorial using Notebook. Under 3D plotting, I am trying to run the first example. The static 3D plot is generated but when I click "Make it Interactive", the Jmol applet fails to load. The error message says JmolApplet#0 has trouble loading, will try again. However, it fails loading. This is the Sage screen output I get:

java version "1.7.0_65"
OpenJDK Runtime Environment (IcedTea 2.5.3) (7u71-2.5.3-0ubuntu0.14.04.1)
OpenJDK 64-Bit Server VM (build 24.65-b04, mixed mode)
This application does not specify a Codebase in its manifest. Please verify with the applet's vendor. Continuing. See: http://docs.oracle.com/javase/7/docs/technotes/guides/jweb/security/no_redeploy.html for details.
Application title was not found in manifest. Check with application vendor
Application title was not found in manifest. Check with application vendor
script ERROR: script ERROR: io error reading http://localhost:8080/home/_sage_/30/cells/14/cells/14/sage0-size500-473909326.jmol.zip|SCRIPT: java.io.FileNotFoundException: http://localhost:8080/home/_sage_/30/cells/14/cells/14/sage0-size500-473909326.jmol.zip

I have Open JDK 7 and IcedTea installed on Ubuntu 14.04 (64-bit). If I go to the Jmol website www.jmol.org, I can run their demo and the Jmol applet IcedTea loads just fine in Firefox, it only doesn't work in the Sage Notebook.

Thanks for your help,

Istvan