XPS 12 9250 and WD15 with HDMI Video

Everything works on the dock but video.  I had it working by installing all the suggested drives and it di work for one day but never again.  Called support and they had me run the things I had already tried then asked me to call HP about my monitor. 

I have a standard HP2159m monitor plugged into the HDMI port.  But every time I try to turn on Multiple Display in the Intel Graphics, it only shows one monitor.

Any ideas will be tried!  This screen is ok for limited mobile use but for business use, everything is too small.

Thanks!