BarChart can´t use odata remote DataSource ?!

[dravus peter]

I Like to use a Chart in my website...
and use this chart with datasource to my "wcf data service".


// DataSource

//#########################

 

 $(document).ready(function () {

 

 

        var remoteDataSource = new kendo.data.DataSource({

            type: "odata",

            transport: {

                read: "http://localhost:1674/WcfDataService1.svc/Stats"

            }

        });

 

        remoteDataSource.read();

 

 

 

// Chart

//#########################

                   

$("#chart").kendoChart({

            title: {

                text: "Kendo Chart Example"

            },

            dataSource: {

                data: remoteDataSource

            },

            series: [{

                name: "Customers",

                field: "Customers"

            }],

            categoryAxis: {

                field: "Datum"

            }

        });

 

    });



The Dataservice and the Datasource works but my chart throw each times an error:
"Uncaught TypeError: Object [object Object] has no method 'slice'" but why??

If i use the same datasource with a gridview it works very fine :(