Error loading data with COPY

I am in the prototyping phase of a conversion from dbase to postgresql

I am trying to load data with the copy function,-------

*ham-existing=# \copy invst from '/home/fmwdba/transcoma' using
delimiters ','

I then get the following error --------

ERROR:  value too long for type character(7)
CONTEXT:  COPY invst, line 1, column stknum: "'0020338'"
ham-existing=#*

however, if I use the insert command and give the field names the data
will load.  Can anyone see what I am doing wrong?  I need to use the
copy function as I have a lot of data to load.

This is how I created the table
CREATE TABLE Invst (
      STKNUM               CHAR(7) NOT NULL,
      RATIO                NUMERIC(4,1),
      PUBLET_              CHAR(1),
      SORTNUM              CHAR(1),
      BINNUM               CHAR(4),
      BIN2                 CHAR(4),
      WEIGHT               NUMERIC(5,2),
      MUSICCDSLS           NUMERIC(4),
      AZTOOHIGH            CHAR(1),
      AZMAXPRICE           NUMERIC(7,2),
      OVERSIZE             CHAR(1),
      KEEPOFFWEB           CHAR(1),
      NEWSTKNUM            CHAR(7),
      ROLL_NUM             NUMERIC(1),
      DATEONAZ             DATE,
      AZCURINV             NUMERIC(3)
);

CREATE UNIQUE INDEX XPKInvst ON Invst
(
      STKNUM
);


ALTER TABLE Invst
      ADD PRIMARY KEY (STKNUM);