Hai x8086,
Have you inserted the List Items ??
Yes I did.

Hai cilu,
Do you have a breakpoint in NM_CLICK's handler too?
No.

I just kept a break point in the function where SetItem() is used.
That's it.

I tried with other application this problem does not happened.

And I carefully rechecked my application and nowhere I found the problem.

Does any time anybody experienced the similar situation ?

Thanks....