Core FTP

I have 1-2 instances each day when a transfer from client gets hung up/stuck and it will show with STOR command on the server console and then I have to manually kill the connection ( as client has already disconnected hours ago). Why doesn't system kick it out automatically based on timeout setting...

We even updated to latest version 674 still same issue remains.
only way to get coreftp server working is to reboot the server but even then if we click on coreftp icon to open the console, we get error = 32 and the console might even open sometimes but the ftp service stops working.

coreftp version 2, build 649, 64 bit we are having strange issues with the server. Sometimes it would stop randomly. When we click on program icon to restart it, it somtimes would give error of "sharing violation". Sometimes it would run but the window to configure will not open at all alt...