(Hi @ElonKou, I combined both of your messages in one thread)
Based on the screenshot in this message, please try loading the following series only:
ep2d diff mddw 64 cor (series 9)
All of the other ones with a longer name (like ep2d diff mddw 64 cor TENSOR) are derived sequences calculated on the scanner, and are not supported by DWIConvert. You could load some of the caculated ones like ADC or FA as scalar volumes, but for DTI analysis please start with the sequence identified above and use the calculation tools within Slicer.
Hope that helps.