Are you having problems becuase the image is too big? I use a program called Irfanview. Its a free download and it does all sorts of stuff.
Just save your PIC anywhere in your computer ( i use my documents) . See the "attach image" down there.... push browse, find the name photo and clcik on it.. then push "post" it will automatically upload it.
The photo cannot be bigger than 500X500 pixels. The irfanview will resize your pics.
Hope this helps, kIm