[syslog-ng] problem with windows agent and windows 2008

Hi, I have a problem with syslog-ng windows agent. I installed the client in a Windows 2003 machine and it works very well. I try to install the same client in a windows 2008 SP2 machine, but it send ONLY the startup/shutdown of the agent. It doesn't send other log (for ezample the windows event logs). I try to run the agent in debug mode (with /E) but i don't find useful information. Any ideas? Thank