First timer

I just downloaded SmartFTP and I am trying to upload a file to a remote server.
This is the log.

[15:16:27] Remote file exist check: "Fld_MustangFord_0108.pdf".
[15:16:27] TYPE I
[15:16:27] 200 Switching to Binary mode.
[15:16:27] SIZE Fld_MustangFord_0108.pdf
[15:16:27] 550 Could not get file size.
[15:16:27] File size check (SIZE) failed. File not found or permission denied.
[15:16:27] PORT 192,168,13,154,14,20
[15:16:28] 200 PORT command successful. Consider using PASV.
[15:16:28] STOR Fld_MustangFord_0108.pdf
[15:16:28] 553 Could not create file.
[15:16:28] MDTM 20071004185658 Fld_MustangFord_0108.pdf
[15:16:28] 550 Could not get file modification time.
[15:16:28] TYPE A
[15:16:28] 200 Switching to ASCII mode.
[15:16:28] PORT 192,168,13,154,14,21
[15:16:28] 200 PORT command successful. Consider using PASV.
[15:16:28] LIST -aL
[15:16:28] 150 Here comes the directory listing.
[15:16:28] 226 Directory send OK.
[15:16:28] 361 bytes transferred. (N/A/s) (0 ms)
[15:16:28] Transfer failed. Use the Transfer Queue for automatic retries.


It just doesn't upload. I've tried switching between passive mode and active mode but nothing seemed to make a difference. What am I missing?

It seems you cannot create a file on the server. Insufficient privileges?
[15:16:28] 553 Could not create file.

Regards,
Mat