Unable to Enter data into fields in IWP

[Crapples]

I have a layout that has several fields in it. All of them are simple editable fields. If I create a new record, I can tab from field to field and fill them all in; however, if I'm viewing an existing record I can only click in ONE of the fields to edit it -- I cannot click into the others! I'm just beginning to experiment with IWP. Is this sort of glitch common? If so, is there anything I can do about it? Thanks.