Informix, PowerBuilder, Views

We would like to use views rather than table access with PowerBuilder. However . . . The views are not updateable, no matter what we try. They are updateable in ISQL under Unix. Just not under client/server via INET. We made certain to have a primary key. We made certain to have the primary key column in the view. We made certain that the view referenced only one table. We made certain to set the row update properties within PowerBuilder. The view remains not updateable. Any thoughts or experiences dealing with Informix views under PowerBuilder? Thanks. Mitch