Hello,
we experienced same issue that is described here, but with NetDCUA5:
Change of Daylightsaving time during power off
Using GMT+1, WinCE is able to change DST only if board is powered on, but does not change if it's powered off (after powering on again WinCE does not set any time as expected)
On the other hand, if time is set to default Pacific GMT-8, then system time is not changed even with CPU powered on (dont know why, as to my knowledge in USA they use DST time too as in Europe).
Any idea ?