What is the data type of IDKunde? If it's text that should be "1" and not 1.
And the filter only filters between the 2 Dates
That means what? You get records where IDKunde is not equal to 1 but in those records the dates are as expected?
IDKunde value comes from a combo on a form. Does the combo bound column have numeric values or are you looking at the wrong column? Is there always a value in that combo?
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.