I did a lot of similar programs for a client recently. The biggest reason for an upload not happening IMHO is the last one you suggested. Without the enctype tag most browsers are unsure just what to pass and seem to just pass the filename as a text string. While this may be what you want in some cases, it wont be in most.

In reply to RE: (Ovid) Re: Fil Upload Problem by Caillte
in thread Fil Upload Problem by vipinh

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