I can`t connect pgadmin to postgresql on VM

Hi everybody!

I have a server (CentOS 5.6 VirtualServer 2.6.18-238.19.1.el5 #1 SMP Fri
Jul 15 07:31:24 EDT 2011 x86_64 x86_64 x86_64 GNU/Linux+KVM) with
virtual machines (CentOS5.5 2.6.18-194.el5 #1 SMP Fri Apr 2 14:58:14
EDT 2010 86_64 x86_64 x86_64 GNU/Linux+Postgres 8.1.23+javasoft ). All
VMs work correct, but recently I spotted that I can`t connect any
version pgadmin to any DB on VM, it hang. When I break off the connect
in log there appears:
LOG: could not get data from client: Connection reset by peer
LOG: unexpected end of file (EOF) when connecting the client

My studing shows the next:
1 Connection from linux console via psql works in both ways, as from VM
to VM or any linux server as from any linux server to VM.
2 All services on VM:http,https,ssh work properly when remote connects
occur.
3 tcpdump port 5432 shows traffics in both ways.

Update pgadmin doesn`t fix it.
Reinstall postgresql doesn`t help.
Creating new VM and setup postgresql doesn`t resolve problem.

If you have some suggestions inform to me, please.

Everybody thanks!