Hijri date not updating after selecting the date in visual studio User Control Enterprise portal ax 2012

Hi,

I have designed one from List page in ax 2012 for adding records i have created one user control in C#, vs 2010. Here the problem is i have one date picker which i selected the date that should convert to hijri date in the ax bound field.

here i added update on post back as true in ax form.

But the problem is when i try to update the hijri by selecting the date by clicking the date picker its not updating i need to click it one more time or i need to press enter button in the webpage after selecting the record.

check this if any one worked on this issue.

Thanks.