Tooltips disapper

I have an application in which I am setting the tooltips of the objects using the ToolTip class. Tootltips appears normally but at times it disappers. If I click any of the toolbar in my applcation, tooltips starts appearing again.
Can anybody help?
Thanks in advance.
[276 byte] By [Dmalik] at [2007-11-19 7:28:42]
# 1 Re: Tooltips disapper
It is the way it should work (by design)!
Krzemo at 2007-11-9 1:46:37 >
# 2 Re: Tooltips disapper
I think I didn't cleared my problem. Few button controls other than toolbars have the tooltips disappered. On the clicking the toolbars the tooltips in some different controls starts appearing.
Dmalik at 2007-11-9 1:47:37 >