Map Chart -name out of longitude_latitude

[chloe]

Hi,

I have a table with these columns: 

[Stores]:
LOAD
 StoreID,
"Store Name",
Country,
longitude_latitude
FROM [lib://DB/Stores.qvd](qvd);

When I create a Map Chart based on longitude_latitude, I get the longitude_latitude on the layer.

How can I change the layers to "Store Name"? 

Thanks!