The second image has been moved or deleted from your photobucket account.
To post a picture - go to your photobucket account, hover the cursor over your required picture. Beneath the pic it should give you some options and it should say:
Email & IM
Direct Link
HTML Code
Img Code
Left click the mouse on Direct Link then right click and select copy. Now go to the post you have open on THIS site and at the top of the text box find the icon that says insert image. (its near the centre of the page at the top) Left click the image and a box will open, in this box right click on the text box in the middle and selct paste. Select OK at the bottom and then you should have this: