ODBC Drivers error '80040e57' on SQL Insert

I've seen this posted and answered, but it doesn't fix my issue.

Here is my code:

<%@LANGUAGE="VBSCRIPT" CODEPAGE="1252"%>

<%
Dim cnnC3DB
Set cnnC3DB = Server.CreateObject("ADODB.Connection")
cnnC3DB.Open "Driver={SQL Server};" & _
           "Server=xxxxxxx;" & _
           "Database=xxxxxxx;" & _
           "Uid=xxxxxx;" & _
           "Pwd=xxxxxxx"

dim disk_number, classification, title, location, release_date, language, color_code, format
disk_number=request.form("disk_number")
classification=request.form("classification")
title=request.form("title")
location=request.form("location")
release_date=request.form("release_date")
language=request.form("language")
color_code=request.form("color_code")
format=request.form("format")

dim SQL
SQL = "INSERT INTO software (disk_num, classification, title, location, rel_date, lang, color_code, format) VALUES ('"&disk_number&"','"&classification&"','"&title&"','"&location&"','"&release_date&"','"&language&"','"&color_code&"','"&format&"')"

cnnC3DB.Execute(SQL)

cnnC3DB.Close
Set cnnC3DB = Nothing
Set disk_number = Nothing
%>

all datatypes are char, with plenty of space.  I have read that the cause is too many characters into too small of a field.  All fields except from primary key have nulls allowed.  I will get this error even if I submit without any data.  I have also tried with one character in each field.


any ideas?