Please post the system information (menu: Help->About "System Information") from both computers and indicate on which one you are seeing the problem.
Please also include the logs from the remote browser from both systems.
Logs from Good PC
[22:19:50] SmartFTP v4.0.1140.0
[22:19:57] Resolving host name "ftp.wininspectionreport.com"
[22:19:57] Connecting to 67.199.121.130 Port: 21
[22:19:57] Connected to ftp.wininspectionreport.com.
[22:19:57] 220-FileZilla Server version 0.9.30 beta
[22:19:57] 220 AbsoluteESolutions
[22:19:57] USER win
[22:19:57] 331 Password required for win
[22:19:57] PASS (hidden)
[22:19:57] 230 Logged on
[22:19:57] SYST
[22:19:57] 215 UNIX emulated by FileZilla
[22:19:57] Detected Server Type: UNIX
[22:19:57] RTT: 64.332 ms
[22:19:57] FEAT
[22:19:57] 211-Features:
[22:19:57] MDTM
[22:19:57] REST STREAM
[22:19:57] SIZE
[22:19:57] MLST type*;size*;modify*;
[22:19:57] MLSD
[22:19:57] UTF8
[22:19:57] CLNT
[22:19:57] MFMT
[22:19:57] 211 End
[22:19:57] CLNT SmartFTP 4.0.1140.0
[22:19:57] 200 Don't care
[22:19:57] OPTS UTF8 ON
[22:19:57] 200 UTF8 mode enabled
[22:19:57] Detected Server Software: FileZilla Server
[22:19:57] PWD
[22:19:57] 257 "/" is current directory.
[22:19:57] CWD /docs/12-2010
[22:19:57] 250 CWD successful. "/docs/12-2010" is current directory.
[22:19:57] PWD
[22:19:57] 257 "/docs/12-2010" is current directory.
[22:19:57] TYPE A
[22:19:57] 200 Type set to A
[22:19:57] PASV
[22:19:57] 227 Entering Passive Mode (67,199,120,130,19,138)
[22:19:57] Passive ip address returned from server different from server ip.
[22:19:57] Opening data connection to 67.199.120.130 Port: 5002
[22:19:57] MLSD
[22:19:58] 150 Connection accepted
[22:20:10] 226 Transfer OK
[22:21:13] Transfer Timeout (60s). Closing data connection.
[22:21:13] 186880 bytes transferred. (2.40 KB/s) (00:01:15)
[22:21:44] NOOP
[22:21:44] Server closed connection
Logs from Bad PC
[22:32:32] SmartFTP v4.0.1145.0
[22:32:34] Resolving host name "ftp.wininspectionreport.com"
[22:32:34] Connecting to 67.199.121.130 Port: 21
[22:32:34] Connected to ftp.wininspectionreport.com.
[22:32:35] 220-FileZilla Server version 0.9.30 beta
[22:32:35] 220 AbsoluteESolutions
[22:32:35] USER win
[22:32:35] 331 Password required for win
[22:32:35] PASS (hidden)
[22:32:35] 230 Logged on
[22:32:35] SYST
[22:32:35] 215 UNIX emulated by FileZilla
[22:32:35] Detected Server Type: UNIX
[22:32:35] RTT: 98.656 ms
[22:32:35] FEAT
[22:32:35] 211-Features:
[22:32:36] MDTM
[22:32:36] REST STREAM
[22:32:36] SIZE
[22:32:36] MLST type*;size*;modify*;
[22:32:36] MLSD
[22:32:36] UTF8
[22:32:36] CLNT
[22:32:36] MFMT
[22:32:36] 211 End
[22:32:36] CLNT SmartFTP 4.0.1145.0
[22:32:36] 200 Don't care
[22:32:36] OPTS UTF8 ON
[22:32:36] 200 UTF8 mode enabled
[22:32:36] Detected Server Software: FileZilla Server
[22:32:36] PWD
[22:32:36] 257 "/" is current directory.
[22:32:36] CWD /docs/11-2010
[22:32:36] 250 CWD successful. "/docs/11-2010" is current directory.
[22:32:36] PWD
[22:32:36] 257 "/docs/11-2010" is current directory.
[22:32:36] TYPE A
[22:32:36] 200 Type set to A
[22:32:36] PASV
[22:32:36] 227 Entering Passive Mode (67,199,120,130,19,138)
[22:32:36] Passive ip address returned from server different from server ip.
[22:32:36] Opening data connection to 67.199.120.130 Port: 5002
[22:32:36] MLSD
[22:32:37] 150 Connection accepted
System Info (bad computer)
+- System -----------------------------
Microsoft Windows 7
(Build 7600)
CPU Speed : 3103 MHz
Total Memory : 6142 MB
Free Memory : 2758 MB
+- SmartFTP ---------------------------
Version : 4.0.1145.0
Time Stamp : 2010-10-28 00:28:15
Platform : x64
Id : 400129464
Maintenance : 2011-08-31
Days in use : 284
+- Language ---------------------------
en-US
+- Internet Explorer ------------------
Version : 8.0.7600.16385
+- Winsock ----------------------------
Winsock : 2.2