I can't upload files



I am facing a typical problem with uploading files (small size <10 mb). My internet connection is good and every sites works fine also I send big files to my other customer via dropsend (600mb to 900mb) but I can’t upload a 6mb file in fiverr. Sometimes after trying 20-25 time It was uploaded. Do any one there who facing this problem then please help me to get out of this problem. Thanks.