In-Reply-To: <20011229185339.24430.qmail@mail.securityfocus.com> Any extension that IIS maps to C:\perl\bin\Perl.exe causes this problem (not necessarily .pl). You can define a custom error page for 502 errors to hide your path. You can also map to C:\perl\bin\PerlIS.dll but there are some differences so don't blame me if anything blows up. Cheers.