All ASP programs on an IIS web server run under the same account. This account is usually named "IUSR_[something]". This is known as the "Internet Guest Account".

Since CuteEditor for ASP is a ASP  program, which runs as the Internet Guest Account, the permissions on the "ImageGalleryFolder", "FlashGalleryFolder" specified in the CuteEditor must give the Internet Guest Account read, write and delete access. The easiest way to set all the required permissions is with the single permission "Full Control".

Hope it helps.