In a Linux environment...When you run Linux> java -jar apex.war
command to configure the apex listener...and on the prompt "Enter the APEX statis resource location or Enter to skip:"
enter the full path of where the images are not just the parent directory path....for example the full path enter
then on the script to start the listener enter
Linux> java -jar apex.war standalone --apex-images /u01/app/oracle/product/11.1.0/dbTEST/APEX_4.2.2_en/apex/images
then your listener will start.
I have heard that the installation doco says to just enter the parent path which in the example ends after the APEX_4.2.2_en