index.pl weirdness

The cgi-bin directory has many perl files in it. All execute except
index.pl which produces the browser Save As dialog. The content of the
file saved is index.pl (not something else).

However, if I rename the file to something other than index.pl (e.g.
index1.pl), it executes as it should.

Please help as this is driving me potty!

Thanks
Colin


httpd.conf looks like this:

Alias /cgi-bin/ "/home/newbusiness/www/cgi-bin/"
<Location /cgi-bin>
SetHandler perl-script
PerlSetupEnv On
Options +ExecCGI
PerlAuthenHandler Authenticate
AuthName Visitors
AuthType Cookie
Require valid-user
PerlAuthzHandler Authorise
PerlHandler Apache::Registry
</Location>