ListGrid OptionDataSources and Sort

Hi,

We have a list grid showing data of table X with 3 columns having the OptionDataSource enabled to the same table X (displaying the NAME field instead of the ID). Everything is all right in the grid itself.

If we configure the sort and add a column which has an option datasource, it does not work and the sorted column becomes the NAME field in the grid, instead of the desired field (whose display field is X.NAME).

Who can we fix this?
(We are using SGWT Power 4.1)

Thanks,
Thomas