I told him that three times. I've given up 
Thank you. Finally worked. I found the issue. I used same BusinessDateTime name before and after conversion(target). After changing it to new variable, it worked.
Thank you So much Jenni. I am surely learned a lot.
I will test throughly and close in case if everything is working the way it suppose to work.
Thank you.
Thank you Badger.
Thank you both.