[syslog-ng] Problems with TCP connection

Hello ! I am running syslog-ng 1.4.4 on Linux RedHat 6.1. I use one syslog-ng server where I collect all syslog messages from 10 systems with syslog-ng connected with TCP. I have problems with reconnection. Syslog-ng on client systems does not reestablish connection with server if connection is broken for long time ( around 2-3 hours). I need only restart syslog-ng daemon on client system. Does anybody have ideas about it ??? Thank you in advance.