Hi Rod,
You probably executed aolserver once before as root (maybe), and now you are executing it again as another user. Make sure that there are no instances of aolserver running now, and then delete the file pid.beethoven. Then try to start aolserver again.
Haven't installed postgresql yet? If you are doing the installation for the first time, follow the instructions "exactly" and in sequence, you will get the installation right.
good luck.
/Mohan
