I'm having a problem even with the latest Courier-IMAP + sqwebmail

when I try to respond or send an email I get:

------------- Internal Server Error The server encountered an internal error or misconfiguration and was unable to complete your request. Please contact the server administrator, post...@ufv.br and inform them of the time the error occurred, and anything you might have done that may have caused the error. More information about this error may be available in the server error log. Apache-AdvancedExtranetServer/2.0.50 (Mandrakelinux/7.2.101mdk) mod_perl/1.99_16 Perl/v5.8.5 mod_ssl/2.0.50 OpenSSL/0.9.7d PHP/4.3.8 Server at http2.ufv.br Port 80

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I tough it might be sendit.sh but it seams it isn't executed (I put a touch for a file in /tmp that wasn't even created)

My guess is apache security of some type but can't find anything in any log (syslog, messages, httpd logs, daemon log etc etc logs)

Strange is that qmailadmin (in the same "DocumentRoot" that sqwebmail is) works perfectly.

I'll apreciate any help

Versions: vpopmail: 5.4.2 qmailadmin: 1.2 courier-imap: 3.0.8 sqwebmail: 4.07