date-range month not changing

[silpa4]

I m using date-range option.
In this, based on the month selection getting values from server and plotting those values in the calendar. When changing the month getting the values from server and trying to plot the values on the calendar but it shows only the current month not the changed month. so plotting values not happening.
For example my current month is september and changed that to october when got data from server again the calendar shows september not october. Means dynamic data not working properly
Pls help ASAP