On correspond external condition doesn't work

I’m trying to set scrip which should be triggered when some update
(reply to solver questions etc.) from requestor is received. I need to
set state atribut to open.

But correspond condition doesn’t work in this task for me. I installed
(http://wiki.bestpractical.com/index.cgi?AnyTransactionSource ) and I’ve
noticed that when I send reply to requestor “On Correspond Internal” is
triggered but when requestor send me an update "On Correspond External"
doesn’t work.

I’m using fetchmail to download email of requestor with this config:

set daemon 30
protocol POP3
username rt32
pass ******
mda “/usr/local/rt3/bin/rt-mailgate --action comment --url
http://helpdesk/ --queue helpdesk”

I’m using RT 3.2 with apache 1.3.33 staticly linked with mod_perl.

Any ideas?

Thank you

Josef Hajas