Why is our Splunk Universal Forwarder not able to read the modification on a file under the path "C:\Program Files (x86)"?

My Splunk Universal Forwarder is not able to read the modification on a file under the path "C:\Program Files (x86)" My inputs.conf is: [monitor://C:\Program Files (x86)\TeamViewer\TeamViewer13_Logfile.log] sourcetype = TeamViewer:Connection:Client index = teamviewer disabled = 0 queue = indexQueue What am I doing wrong? I cannot see anything about this file in splunkd.log.