connect to iphone sensor

I want to connect the matalb in my MAC Pro to the matlab mobile in my iphone. I have already set the ip address and set up the mobiledev in my laptop (m=mobiledev;). however, in cell phones GUI, it seems that my iphone has already connected to the computer, which is shown in the attachment. however, in the matlab in my compter, when I want to set like: m.Logging=1; it appears error like: MATLAB Mobile is not connected to this computer. I just don't know why????? besides, there are some warning like: error parsing JSON: