in reply to
call a Perl script from another Perl script, server-side, with parameters
Yes. Don't confuse CGI with command line. If your second script expects to be called as a CGI script, do that. Or else simulate everything that the webserver does to call a script (not trivial).
-- Randal L. Schwartz, Perl hacker
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119.