Batch Upload "PB" Error With .tif

[Kodak_SLRc]

Hi, Noob here,
I've successfully installed CPG using my web hoster's script (bluehost.com). Created 2 categories and 4 albums, no problem. Batch added 9 .jpg files to album "JPEG Renderings" no problem. Get "PB" error when I try to batch add 9 .tif files to the album "TIFF-Renderings."

Tried so far:
- Checked permissions of files and folders: .tif folder/files same as .jpg folder/files
- Checked that default modes for directories and files match modes of directories and files
- Checked that .tif filetype is installed.
- Checked that "Max size for uploaded files (KB)" is big enough (set at 20480 KB, biggest file is 16.7 MB)

www.thomasrobertfrederick.com/pal/images/

Ideas?

Thanks,
Tom

[Kodak_SLRc]

Also tried: Installed plugin "filetype editor" and editing filetype .tif from document to image and then try batch upload again. Now instead of "PB" I get a blue square with a white question mark. Double clicking on that results in a screen saying only "The image you have uploaded is corrupted or can't be handled by the GD library."

[art2009]

    Try to set up here:   Method for resizing images --------------------  Image Magick GD version 1.x GD version 2.x 

[Joachim Müller]

No support for coppermine galleries where the "Powered by Coppermine" tag has been removed. Restore it permanently if you want support. No support for pre-installed coppermine galleries or clones. No support for auto-installers. If one of the later applies to you, perform an upgrade as we suggest in our docs.