Hi buddy_a,
I think it is the flash9 problem(client pc not the server)
Try upgrade to flash10 and try again.
Another way
Use 'IFrame' upload mode
These steps tell you how to change the Upload mode of "Insert Image" button
1. Open file CuteSoft_Client\CuteEditor\Dialogs\InsertImage.aspx
2. Find section below
<CE:Uploader id="InputFile" runat="server" ></CE:Uploader>
Change to
<CE:Uploader id="InputFile" runat="server" UploadType="IFrame"></CE:Uploader>
Regards,
ken