[PDF Creation] Insertion of image on a PDF using EzPDF library

Hi all, Here is my problem. I got a web application, who must build a PDF using datas from a MySQL table and a logo (JPEG format), and send the PDF generated by mail. I manage to build the PDF. Instead of sending it via mail, I tried to open it directly on my browser, IE 6.0. All is ok, I see my datas, and the logo. But when I send it via mail, all I got when I open it on Acrobat Reader is datas, but the logo isn't displayed. Instead , I got a grey bow, and an alert message telling me : "Image too big". Of course I tried to put an image 15px*15px, so, not that big ;) but it's the same. I really don't understand, and as the library I use is specifical, it's not really easy to find help or documentation. And to be honnest, my application is soon finished, and if I had to change of library, it would take me lot of time :( I would really appreciate any help :) Thanks a lot. Natacha