Astra S - no depth data for SXGA


I want to get depth data at 1280 x 1024 with an Astra S.
I set depth resolution to 2 (SXGA) in orbbec.ini. The videoStream is created and has the desired resolution, but I get a timeout error (even with a wait timeout of 20s).
I was wondering if there are any other values to change in orbbec.ini (frame rate, IR resolution…?) or what should I do to get SXGA depth with Astra S.
I am on Windows and using OpenNi



I think the problem is that the Astra S cannot provide a SXGA(1280x1024) depth stream. I looked up the specs and there is only a 640x480 resolution available for the depth stream