550 Can't check for file existence

OK.... so FTP worked fine two weeks ago.

When I log on now I can see all my files and folders, but I can not upload anything from my computer. It's not the webhost sicne I've had others try to FTP and it worked for them.

I've tried:
- bypassing the routher
-restarting the computer
-disable norton anti-virus
-turning off windows firewall

I get the error below. Please help.


[19:16:42] Remote file exist check: "Getting Ready.mov".
[19:16:42] TYPE I
[19:16:42] 200 TYPE is now 8-bit binary
[19:16:42] SIZE Getting Ready.mov
[19:16:42] 550 Can't check for file existence
[19:16:42] File size check (SIZE) failed. File not found or permission denied.
[19:16:42] PORT 24,131,36,133,4,243
[19:16:43] 200 PORT command successful
[19:16:43] STOR Getting Ready.mov
[19:16:43] 553-Can't open that file: Permission denied
[19:16:43] 553 Rename/move failure: No such file or directory
[19:16:43] MDTM 20060926214133 Getting Ready.mov
[19:16:43] 550 Can't check for file existence
[19:16:43] Transfer successful.
[19:16:43] TYPE A
[19:16:43] 200 TYPE is now ASCII
[19:16:43] PORT 24,131,36,133,4,244
[19:16:43] 200 PORT command successful
[19:16:43] MLSD
[19:16:43] 150 Connecting to port 1268
[19:16:43] 226-Options: -a -l
[19:16:43] 226 45 matches total
[19:16:43] 5606 bytes transferred. (17.4 KB/s) (313 ms)