Transfer automatically aborting

I've been trying to transfer a rather large file for days, but I keep getting the error that the transfer has been aborted by user. However, I am not aborting this process - the transfer is just running in the background.

Is there something I am doing to force an abort? Is there a time-out that I'm not finding? :?

The exact messages I am getting are:
Connection closed. Server timeout.
ABOR
550 aborted by user
226-226 ABOR command successful.
226 ABOR command successful
NOOP

If anyone can help, I would really appreciate it!!!

Thanks.