Invalid BLOB Length

I am using Borland C++ Builder 3.0 with PostgreSQL 6.4.2 and the
latest ODBC driver from ftp.postgresql.org.

I created a table users that looks like this:

CREATE TYPE lo (
internallength = 4,
externallenght = 10,
input = int4in,
output = int4out,
send = int4out,
receive = int4in,
default = '',
passedbyvalue);

CREATE TABLE users (
userid int4,
username varchar(255),
userimage lo);

When I try and insert an image, the app returns "Invalid BLOB Length".

What am I doing Wrong?

Thanks

Travis