Why does my application not work with fastcgi?

Your fastcgi might be misconfigured or do not have the right permissions.

To debug, add these lines in your $FGLASDIR/bin/wrapper.fcgi:
echo $FGLASDIR >> /work/tmp/log.txt
ls -al $FGLASDIR >> /work/tmp/log.txt
strace -f -F -tt -s 3000 fastcgidispatch -s >> /work/tmp/log.txt 2>&1

log.txt shows the system calls. Most of the time, you can see "permission denied" on some directories or files.

If you do not find any clues, please contact your local support center with log.txt attached.