I have an Automatically Sort Files task setup to monitor a UNC fileshare for xml files and route them each to 2 different places. On a pretty regular basis, the job seems to stop monitoring for files in the source directory.  There is no error or indicative debug info in the history db.   it just doesn't seem to recognize the addition of the new files after a certain point.  It is using the Default monitoring method.  Is it not receiving 'notifications' from that network drive as the Polling method hint seems to indicate is possible?  should i change to the Polling method to resolve?  upgrade to 4.9.3? 

It is a reasonably consistent time of day though (sometime between 2230 and 2330 CST - Chicago), which seems to indicate an external influence, but without any error info I can't figure it out.

Version info below.

watchDirectory Professional 4.6.7
Key Created 2012-01-18 (yyyy-mm-dd)

Installed components:
GdP Software gdpUtil 1.8.0.0
History Application 4.6.7.522


GdP Software wdAnnotate 4.5.0.419
wdcc v4 4.6.7.900
wdPostMan 4.6.7.519
GdP Software wdRun 4.6.7.900
wdSupport Dynamic Link Library 4.6.5.502
wdopAuditInfo Dynamic Link Library 4.6.6.452
wdopAutoCopy Dynamic Link Library 4.6.7.522
wdopAutoDelete Dynamic Link Library 4.5.6.419
wdopAutoEmail Dynamic Link Library 4.6.7.514
wdopAutoFtp Dynamic Link Library 4.6.7.900
wdopAutoHtml Dynamic Link Library 4.5.0.409
wdopAutoLaunch Dynamic Link Library 4.5.9.32
wdopAutoRename Dynamic Link Library 4.6.7.419
wdopAutoRunBat Dynamic Link Library 4.6.7.419
wdopAutoSort Dynamic Link Library 4.5.8.448
wdopAutoThumb Dynamic Link Library 4.5.9.438
wdopAutoUnzip Dynamic Link Library 4.5.9.451
wdopAutoWav Dynamic Link Library 4.5.0.422
wdopAutoZip watchDirectory Plugin 4.6.7.22
wdopFolderSize Dynamic Link Library 4.6.5.502
wdopMultiPlugin Dynamic Link Library 4.5.6.0
wdopRemoveOldest Dynamic Link Library 4.6.7.10