PCAnywhere: unable to connect to host. host is busy

Hi all,

I had a windows server 2003 SP2 installed with PCAnywhere 10.5 and it was still working until last week.  However, I got an error message "unable to connect to host. host is busy" this week.  I check the server and the host shows it is waiting for connection but I still got the "host is busy" message while trying to connect from other machines.  I reinstalled the PCAnywhere with version 12.5 and the problem remains. Any help would be greatly appreciated!