Hello,
This is an uncommon corruption to the installation of Logos. This issue has been fixed by reinstalling the logos services. I suggest that you install the latest version of logos at the following URL:
http://digital.ni.com/softlib.nsf/websearch/04B76C440048592886256D75006E6B8A?opendocument&node=132060_US
Regards,
Chad Evans
National Instruments