Not upload everything to my site.

I am having trouble uploading some files. I just tried to upload an MP3 file and it won't go. here is what is said.

[12:30:27] 345 bytes transferred. (10.5 KB/s) (32 ms)
[12:30:27] Transfer failed. Use the Transfer Queue for automatic retries.
[12:30:57] NOOP
[12:31:54] An established connection was aborted by the software in your host machine.
[12:31:54] Server closed connection

Can you help me?