Column names in Calc graph

I have graph, in calc, with columns. Eaach column has its number, 1 to 5.
I would like to rename the column name from the numbers (1,2,3,4,5) to names from the table, using data range…
The 5 names I want to give to my 5 columns are in the first column of my table.

But, when I mark them, the columns in the graph dissapear, and I just got right names on the x-axis, but no graph columns.

Please be more specific in your question. Calc (spreadsheet) columns are labeled A, B, …, Z, etc. A graph usually has no columns; tables do. Could you provide screenshots?

An example file would be useful