Grid column configuration

[Anan]

Hello

I am dynamically constructing the grid columns in code. The columns have filters. The filter icons appear for all columns but for not two.
The grid is present in one of the tabs in a tab control. When I switch the tab and come back, the filter icons appear. Its only happening the first time. The two columns are similar to other columns. The bindings are correct. Is there a way to refresh the filter icons once the grid is constructed?

Thanks

[Anan]

Anybody please????