I'm usind the newest version of FTPRush in Single Connection Mode.
When adding a few folders to the queue so that FTPRush should FXP them the first folder works fine. After that, FTPRush creates a new folder on the destination FTP with the folders name but didn't FXP any files. The 3rd, 4th etc. folder won't even get touched by FTPRush. Just the first folder with transfer completed and second folder with creating the destination folder but nothing more.
I don't know if that problem exists in the earlier versions but because i didn't found anything regarding that problem to any earlier version i don't assume that problem is there too.