problem fetching data in virtual mode from column perspective

hi,
i have set virtual mode as true for my page. now the rows are coming virtually 200 at a shot. when i scroll down then other rows appear eventually,
but same is not happening for the columns. if i scroll left i can not see that previously invisible columns are appering. it seems all the columns are loaded previously. can some one suggest how can i make the virtual mode applicable for columns(when i scroll left or right the columns should be loaded dynamically)?

Virtual mode (incremental display) is implemented for both rows and columns in AW 2.5 (it was rows only in AW 2.0).