This is a very old FastCGI issue but I have never found a satisfactory answer.
Searching the phrase "(13) permission denied fastcgi can't create server" on Google will show that there's a lot of people experiencing this issue for a long while.
Some people blame it on selinux and suggest turning it off (not acceptable solution).
Other people think that it's a strange symlink permissions problem and suggest turning the Apache logs directory from symlink to a plain directory. (not acceptable, since it involves moving the logs files) See Installing FastCGI.
Below is the dreaded error as typically logged by Apache.
[Wed Jun 14 22:09:34 2009] [notice] Apache/2.0.40> (Red Hat Linux) configured -- resuming normal operations [Wed Jun 14 22:09:35 2009] [crit] (13)Permission denied: FastCGI: can't create server "/var/rt3/bin/mason_handler.fcgi": bind() failed [/etc/httpd/logs/fastcgi/70d9a528c5892f2bf0c25e5a334bed81]
Hoping serverfault can finally provide a definitive answer to this perplexing and annoying problem which has plague FastCGI users for years.
I feel uneasy implementing the suggested "cures" when no one really knows the underlying cause of this illness. Hope to get to the bottom of this mystery.