Lost connection to data file

[netsense]

G'day all,

I have XP running in a Virtualbox session on a Centos 5 server. It's there to allow multiple people to access (not simultaneously) a single-user version of Quickbooks via RDP, without having to wait the 3 minutes it takes Quickbooks to load even on my quite quick PC, just to print a customer receipt. The application starts in the morning when the server starts, so is ready and waiting for anyone to use it. The data file is located in a samba share on the same server.

However, not infrequently, when opening the RDP connection, Quickbooks appears, but as soon as we try and click on the interface to open a form, it report "Lost connection to data file" and needs to be restarted, taking the obligatory 3 minutes. This seems to be more likely to occur the later into the day it is; i.e., the longer the Virtualbox session has been running.

This is frustrating, and whilst it doesn't happen all the time, somewhat defeats the point of the exercise.

Is there a setting in Virtualbox that would cause - or solve - this problem?

Thanks
Edwin

[mpack]

Cross-posting is not allowed. Other discussion here. Locking this one.