Uploads are not working

I can see the remote server files,
and my local server files,
but when I try to upload selected files from the local to the remote server,
I keep getting the following messages:

[09:50:42] NOOP
[09:50:42] 200 Zzz...
[09:51:12] NOOP
[09:51:12] 200 Zzz...

How can I fix this and begin uploading files?