Content Conversion in sender SFTP in PI7.1

Hi,

This is my input file

"Contract No. Call No. CAGE Code DUNS Plus4 Check No.

"W9121510C0003 07187 188459929 C06644 BVN0001

Everthing is tab delimeter.

i need to delete this first row which is label.

i have tried with this content conversion but its not deleting the first row.can any one help on this

xml.documentSkipFirstRows 1.

Regards,

Dinesh