[RESOLVED] Data not being written to Datarow

[soandos]

First I select a datarow using:

datarow[] rowtochange = datarow.select["ID = "+variable];

and the edit it with

rowtochange.beginedit();
rowtochange[0]["column_1"] = ... ;
               .
               .
               .
rowtochange.endedit();
rowtochange.acceptchanges();

the data runs without error, and yet no data gets changed.
why is this?

using .net 3.5