timeseries plot with multiple y axis

We have a data set of two (1014x1) elements. Need to plot the data vs time.,(ie,in the format HH:MM:SS.)

X axis time must be from 11:51:20 to 12:08:11.But the data on 2 opposite y axis are different.X axis remains the same for both Y data.

Not getting the plot by using plotyy function.

plotyy(ts1.time,ts1.data,ts1.time,ts2.data);
datetick('x','HH:MM:SS');

kindly guide.