We recently upgraded to QB Enterprise ver. 23 running on Right Networks remote hosting.  We are a small organization with only 2 users and 6 employees.  QB has started exiting the program when I try to go to single user mode so I can import a payroll .iff file on a random basis.  Some times it can take 2-3 attempts to successfully go to single user mode without QB shutting down.  Then, once the file import is complete QB once again shuts down.