set filter to odata service

Hi experts,

i read odata service by using sap.ui.model.odata.ODataModel.read and it works for me.

with this method we read data from our extended my appointments odata services. now i want to set a filter to the odata service, so that in shows only all appointments for the current date. i tried it in the code snippet below, but i doesnt filter the data, it allways show me all appointments.

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did i set the filter correct? or do i have to do something in the backend, so that the filter i sent will work?

best regards,

Katharina