Do
exactly as suggested in the
upload troubleshooting section. It clearly says what you need to do when requesting help. If you don't, we can't help you. The upload troubleshooting section is pretty short, it should take lesss than three days to read it. Let me quote it to you here, highlighting the important bits that you failed to observe:
4.11.4 Upload troubleshooting
If you are experiencing issues with coppermine's upload process, temporarily change your coppermine settings as suggested below to get more detailed error messages:
* Go to your coppermine page and log in as admin
* Go to the config screen
* Scroll to the bottom of the page
* Expand the "Maintenance settings" section by clicking on it
* Enable debug mode for everyone
* Leave display of notices switched off
* Save the new settings by clicking on "Save new configuration"
* Go to the "groups" panel
* Set the upload form configuration for all groups to "Single file uploads only" (set File upload boxes to "1", URI upload boxes to "0" and No. of boxes to "fixed")
* Save your new settings
Then try to upload (using http uploads, even if you experienced troubles using another upload method) - you should get a more detailed error message that tells you what exactly goes wrong with your uploads. If the error message doesn't mean anything to you, search the support board for the error message you get.
When asking for support on the coppermine forum, post a link to your site and a test user account (the test user mustn't be in the admin group!) with upload privileges, with the above mentioned settings in place - this way, supporters can see the error messages as well. Do not post debug_output unless requested.
When people have issues with uploading and decide to post their question on the Coppermine support board, they usually are told to read this upload troubleshooting section. Many of them fail to do so properly, which results in frustration both for users as well as supporters. To make this absolutely clear: the above mentioned steps are absolutely mandatory, no matter what skill level you have, no matter what upload method you have troubles with. Failing to do exactly as suggested will result in your request for help being ignored. Yes, this applies to you. We mean it!
A blind guess: in your first posting, you mentioned using Dreamweaver. Don't use WYSIWYG-editors like Dreamwaver to edit Coppermine files unless you know your way around. WYSIWYG-editors tend to "beautify" code they find, messing with PHP files, leaving them broken. I suggest uploading vanilla coppermine files to your server that you haven't touched with your editor. Make sure to use a "real" FTP-client, not some tool built into your WYSIWYG-editor. For details, do as suggested above.