In DTS, I cannot see DB2 tables

1. My objective is to copy database from AS400 to SQL, then from SQL to AS400.

2. I was able to copy from AS400 to SQL.

3. My problem is how to copy from SQL to AS400

Background:
In Transform Data Task, Source Tab, Table/View. I cannot see tables from DB2, as a workaround I typed Select command in SQL Query and it works to copy database from AS400 to SQL. But I guess workaround is not possible for SQL to AS400.

Whenever I open Transform Data Task this error message appear:
Package Error, Error Source: Microsoft DB2 OLE DB Provider, Error Description: SQLCODE 206. (I checked the meaning of 206 = columns does not exist in any table in the Select)

Environment:
AS400 V4R2, Windows 2000 Server, SQL 2000, Microsoft OLE DB Provider for DB2

This is my 1st time in the forum, "Shukran" or thanks to anyone who will reply.