Helloimnice
You tried to add the photo ajperez.jpg to an article, but there is no image by that name.
If you want to upload a picture , it's easiest to go to Wikimedia Commons (you can use your Wikipedia credentials if you're not logged in already) and visit the Upload Wizard. Wikimedia Commons can only accept files which anyone can use for any purpose. That means most content you find on the web is not acceptable. But for example, most photos that you've taken yourself are OK to upload.
Here's a screenshot of the Upload Wizard:
You start by selecting the files you want to upload, then you go step by step through the process. In the final step, you'll get some wiki markup that you can copy into a Wikipedia article. Let me know if I can help!
If you have other questions, check out the tutorial or the new contributor's help page.
Calliopejen1 (talk) 02:31, 20 December 2011 (UTC)