XCSoar and Wind

Hello XCSoar users. I love my XCSoar/Streak combo in my glider and I
installed a second Streak in the Pipistrel Sinus. In the Sinus there is
no computer/GPS to feed the Streak and so the XCSoar relies on the
internal GPS of the Streak. With the solo setup, I never see winds.
I've flown zig-zags and circles and never get a wind presentation. In
the settings under Config System Glide Computer Wind, I have Auto
Wind - Both selected. Any ideas.
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Dan, 5J