When I try sending mass mail I've this error:

Started at Fri Aug 30 11:31:11 2002.

Sending emails ...

A fatal error has occured:Could not reestablish connection at (eval 313) line 23.
Please enable debugging in setup for more details.
Stack Trace
======================================
Links (2199): Links::environment called at /home/virtual/site56/fst/var/www/cgi-bin/admin/Links.pm line 418 with no arguments.
Links (2199): Links::fatal called at (eval 313) line 23 with arguments
(motori@cercaziende.it, Could not reestablish connection at (eval 313) line 23.
).
Links (2199): GT::Mail::BulkMail::_smtp_send called at /home/virtual/site56/fst/var/www/cgi-bin/admin/GT/Mail/BulkMail.pm line 747 with arguments
(GT::Mail::BulkMail=HASH(0xc6612b4), gst@isorgente.com, motori@cercaziende.it, "Promozione CercAziende", Promozione CercAziende,
).
Links (2199): GT::Mail::BulkMail::_send_one called at (eval 283) line 9 with arguments
(GT::Mail::BulkMail=HASH(0xc6612b4), GT::Mail::BulkMail=HASH(0xc6612b4)).
Links (2199): GT::Mail::BulkMail::_send_coderef called at /home/virtual/site56/fst/var/www/cgi-bin/admin/GT/Mail/BulkMail.pm line 665 with arguments
(*Apache::DBI::db::quote, *GT::Mail::BulkMail::_sendmail_disconnect, GT::Mail::BulkMail=HASH(0xc6612b4), CODE(0xc6623f0)).
Links (2199): GT::Mail::BulkMail::send called at /home/virtual/site56/fst/var/www/cgi-bin/admin/nph-email.cgi line 128 with arguments
(GT::Mail::BulkMail=HASH(0xc6612b4), GT::Mail::BulkMail=HASH(0xc6612b4), CODE(0xc6623f0)).
Links (2199): Apache::ROOTwww_2ecercaziende_2eit::cgi_2dbin::admin::nph_2demail_2ecgi::main called at /home/virtual/site56/fst/var/www/cgi-bin/admin/nph-email.cgi line 31 with no arguments.
Links (2199): Apache::ROOTwww_2ecercaziende_2eit::cgi_2dbin::admin::nph_2demail_2ecgi::handler called at /usr/lib/perl5/site_perl/5.6.0/i386-linux/Apache/Registry.pm line 143 with arguments
(Apache=SCALAR(0xc76b354)).
Links (2199): (eval) called at /usr/lib/perl5/site_perl/5.6.0/i386-linux/Apache/Registry.pm line 143 with arguments
(Apache=SCALAR(0xc76b354)).
Links (2199): Apache::Registry::handler called at /dev/null line 0 with arguments
(admin, http://www.cercaziende.it/Da_Vedere, CODE(0xc18ed3c), Apache=SCALAR(0xc76b354)).
Links (2199): (eval) called at /dev/null line 0 with arguments
(admin, http://www.cercaziende.it/Da_Vedere, CODE(0xc18ed3c), Apache=SCALAR(0xc76b354)).

Someone can help me ???

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Thanks in Advance
Bye From Italy