Report RDLC Show Dimensions Value not Code

It's very simple to explain - and yey it's causing me much frustration.
I'm using report: Detailed Trial Balance.
I'm adding "Shortcut Dimension 1 Code" and "Shortcut Dimension 2 Code" to the dataset.

Now I see the Dimension CODE and not the name or value of dimension corresponding to the CODE.
The report gives me a long list where the column Department (name of the Dimension) is showing me "24,90,90,90,90".
This is the CODE of the Dimension, which there's a description for in another table (349 Dimension Value I think).

So the simple question is: How do I display the Dimension Value instead of the CODE.
Ex: How do I get the DepartmentName and not a number like 24.

Have tried this following which does not work:

G/L Entry - OnAfterGetRecord()
BEGIN
DimName := '';
DimValName := '';
IF DimValue.GET(GLSetup."Shortcut Dimension 1 Code",GLSetup."Shortcut Dimension 1 Code") THEN
DimName := DimValue.Name;
IF DimValue.GET(GLSetup."Shortcut Dimension 2 Code",GLSetup."Shortcut Dimension 2 Code") THEN
DimValName := DimValue.Name;
END;