UltraWebToolbar not working when adding jquery datepicker more than 16 place in a same webform

UltraWebToolbar not working when adding jquery datepicker more than 16 place in a same webform

I have a situation with ultrwebtoolbar's customrules. In my web form, I have to add 16 jquery enabled Calender or datepicker controls. Some of the buttons defined in ultrawebtoolbar's are suppose to be hidden and defined as btn.DefaultStyle.CustomRules = "DISPLAY: none". It does work perfectly as long as the # of datepicker controls are 15. As soon as I add next picker making it 16th datepicker control, then customrules seems not working displaying all the button defined. So example would be, it is suppose to hide , 'Approval', 'Duplicate' buttons. And it does work, however, as soon as I add extra date picker control making it 16th control, then it display all of the button including 'Approval', 'Duplicate' buttons. It is only happening in IE(I am using 9.0).

Anybody could enlighten me.

I would appreciate it.