Diane, assuming it's your blood brother's DNA result, the great thing about sibling DNA tests is they help you find people who match you too, even if your own DNA kit does not match them. Since we don't get even shares of our parent's DNA, each sibling has similar but different sets of matches. After you have tested each kit against kits from people from known lineages, you will learn which sibling best matches each line. For example, I've discovered I don't match anyone on my Hood line, but my sister matches them fairly well. But I match other lines better than she does.
All to say I recommend uploading each DNA result, yours and theirs, into GEDmatch, and whenever you come across a promising person (with a GEDmatch ID), test each of your kits against theirs. Each relative's kit gives you a better chance of determining if and how another person relates to you and yours.