didn't retry when disconnected

[ryvius]

When flashfxp finished downloading files in one directory and change to another dir, it often get disconnected, especially when the site is very busy. What made me mad is, sometimes flashfxp didn't retry anymore in this very situation. I don't know why.
Here is the log:
=============================================
[R] 150 Opening BINARY mode data connection for tlf.rar (15000000 bytes)
[R] 226 Transfer complete.
Transferred: tlf.rar 14.31 MB in 03:02 (80.40 KBps)
[R] CWD /NT/Vobsubs/
[R] 250 CWD command successful.
[R] PWD
[R] 257 "/NT/Vobsubs" is current directory.
[R] TYPE A
[R] 200 Type set to A
[R] PASV
[R] 227 Entering Passive Mode (*,*,*,*,5,125).
[R] Opening data connection IP: *.*.*.* PORT: 1405
[R] LIST
[R] 150 Opening ASCII mode data connection for file list
[R] Connection lost: TP
Transferred 21 files totaling 285.25 MB in 01:00:55 (80.42 KBps)
==============================================

Sometimes it did retry:
==============================================
[R] 150 Opening BINARY mode data connection for tlf1.rar (15000000 bytes)
[R] 226 Transfer complete.
Transferred: tlf1.rar 14.31 MB in 03:02 (80.42 KBps)
[R] CWD /NT/Cd2/
[R] 250 CWD command successful.
[R] PWD
[R] 257 "/NT/Cd2" is current directory.
[R] TYPE A
[R] 200 Type set to A
[R] PASV
[R] 227 Entering Passive Mode (*,*,*,*,5,199).
[R] Opening data connection IP: *.*.*.* PORT: 1479
[R] LIST
[R] 150 Opening ASCII mode data connection for file list
[R] Connection lost: TP
Transferred 15 files totaling 212.59 MB in 45:21 (80.40 KBps)
[R] Attempting to Reconnect.
[R] Connecting to TP (attempt # 1)
[R] Connected to TP
[R] 220 Welcome....
==============================================

I use flashfxp beta 980, Windows xp sp1. It was the same ftp site and two different reaction.
Anyone can help?