Error importing .xml file

After working on a wordpress site locally, I decided it was time to go live. I uploaded all of my files but none of my posts/image/tags etc. went with it.
I exported all my content from my localhost and tried to import it into my live site but I get this error:

Sorry, there has been an error.
The uploaded file could not be moved to D:\Hosting\3619608\html/wp-content/uploads/2012/01.

Any assistance would be greatly appreciated!