can't mapp a table in calendar popup window

Hi all,



I map a table inside a calendar popup window as following:



+ Go to Object Browser and RClick on table which I want to map and select "Map the Object Name". 

+ The confirmation message will be displayed to inform that the system need to map all parent object of selected table. 

+ Click on Yes

-->The problem is that OK is invisible and I can't map this object. 



Please see attachment file



Could anybody help me to explain about this?



Thanks,

Hoa