It worked.
I hade to change
DoCmd.OpenReport "MyReport", acPreview, "", "[Table/QueryName]![Created]>=[Forms]![MyFormName]![MyDateName]"
to
DoCmd.OpenReport "MyReport", acPreview, "", "[Created]>=[Forms]![MyFormName]![MyDateName]"
As it didnt like it for some reason. But that doesnt matter...