In addition to installation of the Quickbooks server piece, folder permissions have to be set correctly. Make sure you use the Advanced permissions settings area, and choose “This folder, subfolders, and files”.
The program folders have to give full control to “Users”:
http://support.quickbooks.intuit.com/support/Articles/SLN76845
and the data folders have to give full control to the service users created during installation of the server piece.
http://support.quickbooks.intuit.com/Support/Articles/HOW12213