Set the environment variables APPX_NET_LOG and APPX_NET_MASK to have APPX create a log file of why the client is not being started.

If that doesn't work, perform:

   1) Download a fresh copy of the APPX Java Client ('javacli.exe').

   2) Create a new directory (renaming or deleting the old one if necessary).
      Run this 'javacli.exe', installing it into this new directory.

   3) Reboot the client PC.

   4) Try to run 'appxjava.exe' from the new directory.

   5) If it fails, from a DOS window, do a "set" command.  Email the value
      of IBMHPJ_OPTS to us at techsupp@appx.com, along with the location of the
      directory into which you installed the Client.