>AllowCellSelection = .t.
>RecordSource is a table and type is an alias
>HighlightStyle - I have tried all three - makes no difference.
>
>if you use up and down arrows on the keyboard, you can go up and down, but just no click on the grid.

Do you have column source to be AliasName.ColumnName ? Also, is every column and grid enabled?

Also check if there is anything fishy in the parent class and if you have any code in any method of the grid itself and parent class.