First, please make sure that your file is in a format that will work in VoiceThread. Find more information here.
If your file does upload but the pages do not look quite right, please save your file in PDF format, and then upload that version to VoiceThread.
If the file should upload and does not, try clearing your browser’s cache, restarting your browser, and then uploading the file again.
Finally, it could be that your browser or network settings need to be adjusted. Find more about adjusting browser cookie settings for a personal computer and network requirements if you’re working on a local area network.
Note: Free account holders cannot upload files larger than 25 MB.