Problems on "copy" statement

Hi all!

When I want to use "copy" to move data in .csv, which has been formatted
to tab-formatted file, to my postgresql as follow (DB name: test,
tablename: hsi):

copy hsi from 'c:\java\hsi.txt'

it generated error:

ERROR:  relation "hsi" does not exist
copy hsi from 'c:\java\hsi.txt'


if I use double quoted:

copy hsi from "c:\java\hsi.txt"

it generated:

ERROR:  syntax error at or near ""c:\java\hsi.txt"" at character 15


Can anyone please tell me what's wrong with the above statements?

Thanks in advance for your kind help!