You have to read your configuration:
log4net.Config.XmlConfigurator.Configure("log4net.config");
This assumes the name of you configuration file is log4net.xml. The log4net.xml file has to be in your bin directory.
The \logs\ItemChangeLogs folder must exist on your file system. I would change that to something like: c:\logs\ItemChangeLogs, so you know log4net will find the dir on your c drive, instead of an other drive.
log4net configuration documentation
I normally configure log4net using an attribute in the assembly.cs
file like:
// Configure log4net using the .config file
[assembly: log4net.Config.XmlConfigurator(Watch=true)]
// This will cause log4net to look for a configuration file
// called TestApp.exe.config in the application base
// directory (i.e. the directory containing TestApp.exe)
// The config file will be watched for changes.