Teamcity: Schedule Trigger and VCS Trigger Rules

Hi,

I am using TeamCity 5.1.3

I have setup a schedule trigger with the option "Do not trigger build if there are no pending changes". I also have a VCS trigger to ignore all check ins by "abc\usr" because the Nant is running under the user "abc\usr" and it checks in a version file using tfs.exe (team foundation server) however the build sees this as a pending change and still fires the build. Is there a work around for this?