Upload resized images

Hello,

I'm looking to make a image uploader. The problem I'm having is that ImageAlter only gives back the URL not the local file path. I keep getting the error: "files must contain BPTPaths" when I try to upload the resized photos with Uploader.upload.

How do I upload the re-sized images using FileBrowse, ImageAlter and Uploader?

Thanks,
James