Line chart repeated problem

[cruzmil7]

Hi, i have a select that returns this:

Date                 Product1, Product2, Product3, Code

2014-02-20    , 0              , 1             ,2               ,50          

2014-02-21    , 4              , 8             ,1               ,50       

2014-02-22    , 1              , 5             ,2               ,50

2014-02-20    , 1              , 1             ,6               ,51       

2014-02-21    , 0              , 2             ,2               ,51

and i want a linechart per each group of codes (in this case i want 2 charts), my problem is that I get 5 linecharts (3 equals charts for the first code and 2 equals charts for the second code)

this happens if I put the chart into the details band, if I put the chart into the pageHeader band I get an empty chart.

 

Please, help!