Fill command line into SAP



please, I need your help,
I have an excel file that contains 3 columns and I have to fill three other columns in the SAP table with these. for the moment it works at 50%, but the problem is that in sap there is only the first line which is filled, and each time it crushes the first value and it puts the new one, and it continues like that until the end of the excel file

please help,

I remain at disposal for any other information.
best regards,