Apache/FastCGI causes error?

I’m trying to get Ruby on Rails running on an Apache 1.3 server with
mod_fastcgi and I’m oh-so-close. When I run my application with this
line in public/.htaccess it works fine. Unusably slow, but fine.

RewriteRule ^(.*)$ dispatch.cgi [QSA,L]

However, when I change it to:

RewriteRule ^(.*)$ dispatch.fcgi [QSA,L]

It doesn’t work at all, and returns the default “Application Error”.
After going through my Apache error log I found the following two lines
which would probably explain everything if I knew what they meant:

[alert] [client 216.221.90.34] (2)No such file or directory: FastCGI:
failed to connect to (dynamic) server
“/home/sites/home/web/railsapp/public/dispatch.fcgi”: something is
seriously wrong, any chance the socket/named_pipe directory was
removed?, see the FastCgiIpcDir directive

[error] [client 216.221.90.34] FastCGI: incomplete headers (0 bytes)
received from server
“/home/sites/home/web/railsapp/public/dispatch.fcgi”

My apache config looks like this:

FastCgiConfig -idle-timeout 900 -initial-env RAILS_ENV=development
FastCgiIpcDir /tmp/fastcgi_ipc/
AddHandler fastcgi-script .fcg .fcgi .fpl

/tmp/fastcgi/ is owned by Apache, and its permissions are set to 755. I
also tried deleting all sessions from /tmp but to no avail.

Has anyone come across a similar error and been able to find a fix?
I’ve Googled it but I can’t find much. I’m a pretty big newbie when it
comes to Apache and frankly I’m surprised I’ve gotten as far as I have,
so anyone that can help me get over this last hurdle will pretty much be
my hero.

Thanks in advance,
Sean

Hmm… well I seem to have been able to fix this by changing my Apache
config to this:

FastCgiServer /home/sites/home/web/railsapp/public/dispatch.fcgi -idle-timeout 900 -initial-env RAILS_ENV=development -processes 2 AddHandler fastcgi-script .fcg .fcgi .fpl

Where FastCgiServer is the full path to dispatch.fcgi

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