Import csv format file error in schematics?

Hi,I creat a simple table in excel and outport as a csv format file,when I import it into the datatable of creo schematics,it prompts invalid file,error.

So,I change the charactor set to ASCⅡ or UNICODE,and change the delimiter to comma,space or  semicolon,but it does not work.

So anything that I missed?