Hi Jim,
I take it you are running a UBB.threads board then, no? To enable attachments, you have to make a few modifications within your set up and control panel. Here are the directions from your admin guide! <img border="0" title="" alt="[Smile]" src="images/icons/smile.gif" />
1. Use your FTP program to connect to your web server.
2. Go to your UBB.threadsâ„¢ installation directory.
3. Create a new directory for uploads. Set the permissions for this folder to 777 on UNIX or read/write/delete enabled for Windows NT/WIN2K for the IUSR_ (machine name).
4. Go to your UBB.threadsâ„¢ Control Panel and log in.
5. Click on Admin, and then select Edit configuration settings.
6. Scroll down the page about 2/3 from the bottom, to "Allow file attachments". In the space below, provide the path to the directory for uploads that you just created.
7. Below this file path, supply the URL to the file attachment directory.
8. Scroll to the bottom, click update.inc.php and attach away!
UBB.threads admin guide