How do I place a main pic in my story? 

I want to use this: http://data1.whicdn.com/images/150247975/large.jpg as my main story image but it won't appear @@

and also how do I place a background image?

I want to use this: http://data2.whicdn.com/images/150219243/large.jpg and it wouldn't appear too T.T

Help me please, Thank you :****