To increase the high availability of a site at a remote office, you decided to install a second Steelhead appliance as an active/active serial cluster. However, after installing the second Steelhead appliance at the remote site, users started complaining about slow access to the data center. You have verified that this is not a duplex issue. At the data center location all users access the Internet which pass-through the Steelhead appliances. What is the most likely problem?