Question : FTP Server Problem

Okay I am running windows XP with service pack 1
and i am running Serv-U ftp

I have a dyndns set up at dyndns.org

I set up port forwarding on my Linksys WER54G router.

when logon, the server sees me as being there but i can't see any of the folders.

after a while it give me an error

An error occured opening that folder on the ftp server make sure you have permission to access that folder

Details the connection with the server was reset

this is my ftp log

[1] Mon 21Aug06 21:02:14 - Starting FTP Server...
[1] Mon 21Aug06 21:02:16 - FTP Server listening on port number 21, IP 192.168.1.101, 127.0.0.1
[1] Mon 21Aug06 21:02:18 - UPnP: Found device: Linksys: WRT54G (on 192.168.1.101 subnet)
[1] Mon 21Aug06 21:02:18 - UPnP: Inspecting device:  Linksys: WRT54G [70.65.132.237] (on 192.168.1.101 subnet)
[1] Mon 21Aug06 21:02:18 - UPnP: Device discovery complete: Linksys: WRT54G [70.65.132.237] (on 192.168.1.101 subnet)
[1] Mon 21Aug06 21:02:18 - UPnP: Error mapping port 21 to IP 192.168.1.101 (HTTP: 500 - UPnP: 718 - Desc: ConflictInMappingEntry)
[1] Mon 21Aug06 21:02:18 - UPnP: Successful port mapping on ports 44500-44501 to IP 192.168.1.101
[5] Mon 21Aug06 21:02:38 - (000001) Connected to 70.65.132.237 (Local address 192.168.1.101)
[5] Mon 21Aug06 21:02:38 - (000001) Closing connection
[5] Mon 21Aug06 21:02:38 - (000002) Connected to 70.65.132.237 (Local address 192.168.1.101)
[5] Mon 21Aug06 21:02:39 - (000002) Closing connection
[5] Mon 21Aug06 21:02:42 - (000003) Connected to 70.65.132.237 (Local address 192.168.1.101)
[5] Mon 21Aug06 21:02:43 - (000003) User TRACY logged in
[5] Mon 21Aug06 21:02:44 - (000004) Connected to 70.65.132.237 (Local address 192.168.1.101)
[5] Mon 21Aug06 21:02:44 - (000004) User TRACY logged in
[5] Mon 21Aug06 21:02:46 - (000004) Closing connection for user TRACY (00:00:02 connected)


any ideas??

Answer : FTP Server Problem

Check Internet Explorer's settings in the advanced tab.  Is see if you have "Use Passive FTP", checked.  If it is checked uncheck it.  If it unchecked, check it.

This controls which type of data connection IE will use, active or passive.  Both types use port 21 for the command/control session.  

When using active the sever uses port 20 as the source and it (the sever) inititates the connection to the client. The client listens on a random port above 1023.

When using passive the client , using a random port above 1023, connects to the sever which is listening on a random port that is abovr 1023.