[Solved] Combo box get filled but not scrolls

[komila]

hi everyone.
I am new to RAD controls. I am using radcombobox with multiple columns.
While debugging it fills the combo successfully but when I try to open it i mean to dopdown it to see all the items it is not getting scrolled. While in view source it is showing all the items.
I hope i make myself clear about the problem pl help.

Thanks :
Komila