How do you mean "receive" and "host computer"? There's only one file and that's not received, that's used by both clients.
http://support.quickbooks.intuit.com/support/Articles/INF12724 tells the details. I only quote:
"QuickBooks is a multi-user program, as opposed to a "true" network program. Network programs are typically installed on a single server or workstation, and then accessed from that installation by multiple users simultaneously. In contrast, every QuickBooks user on the network must have a separate, licensed copy of QuickBooks installed on their local workstations.
However, while the QuickBooks program must be installed on each workstation, the company data file can be stored on a single server or workstation and accessed by multiple users. QuickBooks allows up to five users (15 users for QuickBooks Enterprise) simultaneous access to the data file across the network."
Are you sure you configured it correctly?
I work for a company that uses Quickbooks 2009 Multi-user on only two computers. The problem is the non-host of company file does not receive the updated file changes from the host computer. Both computers are set to Multi-user