Delphi 7 - TMS Intraweb DB-aware Grid

Question

I'm making a web application by using Delphi 7 and TMS suite for Intraweb. I have several client dataset components and I use a TTIWDBAdvWebGrid for showing the data. TTIWDBAdvWebGrid is a data-aware component, but when I modify some values in grid, the data is not persistent(on cell events the value of the cell is the old one, not the value set by me).

any ideas?