c50le won't sync time / clock

c50le won't sync time / clock

Running about 40+ c50le's and they will not sync their clocks with the timeserver.
They are now correcting themselves from the default US/Pacific to US/Eastern
but they will not set the clock.
I've tried several settings:
TimeServer=xxx.yyy.zzz.11
TimeServer=xxx.yyy.zzz.12
TimeServer=xxx.yyy.zzz.11;xxx.yyy.zzz.12
TimeServer=time.nist.gov

Even sync'ing the clock in the Wyse control panel says it's successful, but the clock NEVER corrects.

Anyone have any advice?
(the IP timeservers above are windows2008 domain controllers)

the time settings in the wlx.ini are below:

;************************************************* ************
;* Time *
;************************************************* ************

TimeServer=192.168.11.11
TimeFormat="12-hour format"
TimeZone="US/Eastern" ManualOverride=true