How do I submit an item as a False Positive if it's over 100mb

As it says in the title, I have an installer that is being flagged by Symantec Ws.Reputation.1. I'm trying to submit it as a False Positive, but the file is 180 MB in size and I can't use the false positive page at https://submit.symantec.com/false_positive/standard/. 

Thanks in advance for any help you can give.