Doesn't work with multiple objects in one SHP file. #23

I'm trying to remove some fields from my shp file via ShapeFileEditor#removeField.
It works perfectly when a file contains only one object (1 row in corresponding dbf file). But it trows an Unsupported DBF file Type 0 when shp contains more than one objects. (several data rows in dbf file).
Is it possible to remove fields from all rows in shp file that contain more than one object?