no data written to file

I recently bought the cyton board with a wifi shield but have not been able to get data from it (my objective is emg at 1000hz) . I updated the cyton firmware to 3.x using the arduino library manager. I also updated the wifi shield to v1.3. I'm using the v3.1 gui on a win 10 machine. Although I have had some difficulty connecting the to shield via a dedicated wifi network and router (sometimes the shield is not found, or found but immediately disconnects, or found and connects but no cyton board detected). Assuming that everything does work (all connected and detected) the gui opens a file but writes nothing beyond the header and no signal is ever displayed. Also nothing is ever written to SD, which would actually be my preference...I read on the forum that gui v2.x might work better so I'll try that. The bluetooth dongle seems pretty solid but limited for frequency even to SD. Ideally I could start the collection via bluetooth and have it record to SD but I have not been able to puzzle out exactly how to do that at 1000hz. So far - this has been quite frustrating. If anyone has any suggestions to get this working, I'd love to hear them. thanks.