How to resume the downloading of files in internet download manager?

It’s really sadistic when the download is almost 99% completed and due to some internet problems the download either fails or asks to refresh the download address. I wondered why isn’t there any solution to this? (remember computer and other things have worked most of the times under trial and error method, and this might not always work). So I browsed through the internet but could hardly find solution to this, so then I began trying out the things , I found that it could indeed be resume, thing you need to is, copy the download address and paste the same in place of the referrer as indicated in the image , and the download resumes.. Note- It might not work for websites like rapidshare and all such related websites….