read about it here. http://www.jalopyjournal.com/forum/forumdisplay.php?f=6 The usual problem is that they are too large, you need to resize them smaller to upload them to the forum as attachments.
Get a free Photobucket account - www.photobucket.com - and transfer the pictures you wish to post to Photobucket. Make sure you check 15" screen under your download size options. Once in Photobucket just click on the photo you want to include and drag and drop it into your post before you submit it - that's how I do it anyway. You can also drag and drop images direct from the Internet direct into your posts before you submit them - just open the photos in a separate window - click, hold and drag to your post.
If you need to resize and you are on XP click on "start" click on Search and put this in "Image resize" and it will find it and you can download it into the computer,store your pictures in "My Pictures" then to post click on advanced then "Browse" when you click on that it takes you to "My Pictures" then just select the ones you want and click on then,click on "upload" and it's done deal.