Upload Image Error

[harboot]

I have installed Storytlr on my server I am using cPanel. It is installed
successfully but when I try to upload an image I get error:

Here are the steps to reproduce the error:
Login to Admin Panel -> Post -> Picture
When I upload an Image I get the above error.
I tried to upload .gif .jpg files but I get the errors
Has anyone faced this error ?
Please post an solution for this if anyone has solved this error.

[harboot]

then i try to use url image (not upload),
when i click Post , i be direct to blank page with 1 text "hello"

what's wrong?

[jmhobbs]

Have you checked the permissions on your upload folder? It should be writable.