Eliot Lee, thanks for your reply. I didn't edit the Admin_HTML.pm, I upload my Template file in ASCII more and I CHMOD all the Template file to 666. Before, I've tested it and everything is fine. Only after I added a new field in the Validate Table (Keywords field added), then this error message happen. What is the problem? Thanks.
Use the editor.cgi script. Click on the Links option in the Table Maintenance link in the left window in the admin.cgi script. Then click on Add Field. OR better yet, download MySQLMan through this web site and use that to administrate and manage your tables.