FreeRadius + mpd + Postgresql. lost connections

[Данила Полубоярцев]

I have VPN-server based on FreeBSD 6.2 + FreeRadius (1.1.4_1) + mpd (3.18_5)
+ PostgreSQL(8.2.1).
It works fine until any user try to enter invalid pair "login/password".
After that nobody can connect to VPN-server.
Moreover, all of opened at that moment connections are lost.

I think that problem with radius + Postgresql configuration, and I do not
know as to solve it.