ADODB.Stream LoadFromFile -> File could not be opened.

I'm using the ADODB.Stream LoadFromFile method to grab a binary file so that I can download it in my classic ASP page.

For whatever reason, it's throwing a "File could not be opened." error and I can't see why.

Just to eliminate the permissions aspect, I have modifified the code and proven I **CAN** open the same file for reading with the FileSystemObject. Since it's binary, the FSO's output is useless, though.

Can anybody see what I'm doing wrong (ErrHandle is my generic error handler)?

        Set objStream = Server.CreateObject("ADODB.Stream")
        if err.number <> 0 then
            ErrHandle 1, Err.Description
        end if
       
        objStream.Type = 1  ' adTypeBinary
        if err.number <> 0 then
            ErrHandle 2, Err.Description
        end if
       
        call objStream.Open()
        if err.number <> 0 then
            ErrHandle 3, Err.Description
        end if
       
        objStream.LoadFromFile strFilePath  ' <==== this fails! file CAN be opened through FSO
        if err.number <> 0 then
            ErrHandle 4, Err.Description & "<br>Number: " & cstr(err.number) & "<br>File: " & txtFile
        end if