lost coonections when downloading very small files

[guqing]

It's very easy to duplicate and happens in windows 2000, XP and 2003. For example, transfer 500 very small files(by local loopback or in LAN), it always happens several times.

It happens during data socket close, FlashFXP seems unable to close data socket, which also causes its control conntion lost(strange?) , and Flashfxp will reconnect to server(xlight ftp 1.60c). But if transfer large file(Over 100K), this will not happen.

I had tried several other ftp clients, they don't have this problem.