Service cannot be started. An instance of the service...

[mrahman252003]

Hi
Can anybody give me tips on why my WCF service crashes? I am using the OPC UA library for the .NET platform. Every now and then my service crashes. I have seen the most time it crashes when I try to connect the UA server (Linux OPC server).
WCF is running in windows 7 and event log shows like this, any help?
It shows the message "Service cannot be started. An instance of the service is already running"
Please see the event log as image http://hemelix.com/sites/default/files/temp/crash.png