I have my doubts about these lines:

SetEnv NLS_LANG `$ORACLE_HOME/bin/nls_lang.sh`
SetEnv PATH $ORACLE_HOME/bin:$PATH
[download]

As far as I know you can't do variable interpolation or use backticks in the apache configuration file. Try setting the variables explicitly in your script to see if that works.

edit: Corion beat me to it :-)