First, check to make sure the file is not open in another application. Then check the file size—it cannot exceed 1024KB. If the file has a virus, the system may reject the upload. In addition, third-party toolbars can interfere with uploading.
Preferred file types include Word™‡, Excel™‡, PDF, GIF and JPG. Converting your file to one of these formats might help. You can upload a maximum of 10 files