If you have log4net configured in the machine.config, to get the app to start you will need to comment out or remove the log4net config sections from the WIM.exe.config and Dashboard.exe.config files. This would include the <section name="log4net"...> element as well as the <log4net> element. These config files are located in the installation folder which is usually c:\Program Files (x86)\Telerik\Work Item Item Manager 2010.
WIM and Dashboard both look to their own config files to for the logging configuration so removing these elements will effectively turn off logging for these applications. The apps should run fine without logging, however, if logging is turned off it will be much more difficult for us to troubleshoot any issues you run into in the future.
the Telerik team
Explore the entire Telerik portfolio by downloading the Ultimate Collection trial package. Get it now >>