Looks like you are trying to use a download manager/accelerator. With Sendspace you have to just right click on the link and let Windows do the job. Can you try this?
It has been very difficult to download from sendspace lately. I think because of heavy traffic or server maintenance.
here's other link :
sambo master - sekai wa sore wo ai to yobun da ze (densha otoko).mp3
http://www.4shared.com/account/file.jsp?id=2492544&sId=XhYcq9wXW0m0Poih