build1010 FXP fails in Winxp with windows firewall

[divfor]

I think it is FlashFxp's problem because:
1. UltraFxp works well for the same environment and same two sites.
2. FlashFxp can work well in FXP from A site to B site, but fails in FXP from B to A. but if turn off MS firewall, the two directions all works well.

btw, FlashFXP always logs correctly in the statuts log windows.