c# - Import exception -

so working on same wpf project on 2 different computers.

i using bitbucket (git) push , pull online repository.

now ive collected project on new computer , want run program. following error:

the invocation of constructor on type 'henvendelser.mainwindow'  matches specified binding constraints threw exception.'  line number '5' , line position '9'. 

now xml:

<window x:class="henvendelser.mainwindow"     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"     xmlns:dv="clr-namespace:system.windows.controls.datavisualization;assembly=system.windows.controls.datavisualization.toolkit"     xmlns:chart="clr-namespace:system.windows.controls.datavisualization.charting;assembly=system.windows.controls.datavisualization.toolkit"     title="henvendelser" height="699" width="888"> <grid>      <tabcontrol          name="tabcontrol1"         margin="0,61,0,0">         <tabitem             header="henvendelser"              name="tabitem1">                  <chart:chart                          name="henvendelser"                          background="lightsteelblue"                           title="henvendelser"                          flowdirection="righttoleft"                           fontfamily="calibri"                           visibility="visible" height="412">                  <chart:chart.series>                     <chart:lineseries                                 independentvaluebinding="{binding path=key}"                                 dependentvaluebinding="{binding path=value}"  animationsequence="firsttolast">                     </chart:lineseries>                     <chart:lineseries                                 independentvaluebinding="{binding path=key}"                                 dependentvaluebinding="{binding path=value}"  animationsequence="firsttolast">                     </chart:lineseries>                 </chart:chart.series>             </chart:chart>         </tabitem>     </tabcontrol>     <button content="hent data" height="55" horizontalalignment="left" margin="744,12,0,0" name="btn_hentdata" verticalalignment="top" width="102"/>     <datagrid autogeneratecolumns="false" height="100" horizontalalignment="left" margin="119,560,0,0" name="datagrid1" verticalalignment="top" width="727"  /> </grid> 

this line 5:

xmlns:chart="clr-namespace:system.windows.controls.datavisualization.charting;assembly=system.windows.controls.datavisualization.toolkit"

now @ first thought imports tried import of dll files again no result

this picture of references

can tell me why getting execption , how can rid of it?

** additional information**

the funny thing error , location able see chart area in gui builder though chart import there problem with.

here picture: