how to make updates to grid


When I make updates to the dhtmlxgrid in the sample files, the updates are shown on the screen but aren’t sent to the server. The config file was modified to point to the right database. The sample files read the data from there but don’t send the updates back to the server. Does anyone know what causes this problem? I downloaded the file and have been testing the samples. The same seems to happen with the dhtmlxspreadsheet.