Are you added localhost as an exception in your Windows Firewall or any other software for that purpose? Are you using a proxy in that computer that might be blocking the access to QlikView ports?
Hope that helps.
Also ensure that the user which is running the Windows services is both a local Administrator *and* QlikView Administrator. Just because the services are up it doesn't meant they are actually working unless of course you've already confirmed this.
Remember that settings such as proxy servers need to be checked whilst logged on as the user running the Windows services not as the administrator.