Put it in a sequence that is the same dimensions as your photo.
What version of P Pro are you using?
I am using CS6
If your images are an aspect that does not fit easily into
a standard video frame, you might need to scale up
(or preferably down) and reposition your images to fit.
What are your image dimensions?
What are your Sequence settings?
What is the intended destination for your finished video?
Premiere Pro / Motion: position, scale, and rotate a clip
How do I choose the right sequence settings?
Also, make sure you're running the most current update (CS6.0.5).
Within Premiere: Help > Updates...
On a side note, 'upload' means to transfer from a local computer to a remote computer over a network, such as the Internet.
What you did was 'import' the images into Premiere Pro.
Depending on the content of your photos, you could use Photoshop's "Content Aware Scale/Fill" to change the aspect ratio of the photo before you import it into Premiere Pro.