I don't think you can post a picture stored on your computer....you have to have your picture/photo uploaded to a site lie Photobucket, Picasa Webalbum...etc (which are free by the way).
Once posted on the website, then find the specific http link, copy it. Now go to your Rolex Forum post and click on the photo icon, "please enter the URL of your image". Erase the " HTTP://" and past your full photo http link that you previously copied. To see if it worked go to advanced and click on "preview changes"
I hope this helps.......
