Is this really anything to do with SCORM, or do you simply mean that large files will not upload?
Enable Debugging in Moodle. Also, open the javascript console in your browser. Try again. Are there any errors in the console (in red) and/or are there any errors in your server logs?
Enable Debugging in Moodle. Also, open the javascript console in your browser. Try again. Are there any errors in the console (in red) and/or are there any errors in your server logs?