Workload Balancing (WLB) and its functionality has been removed from XenServer version 6.2 and higher. Applications, code, or usage that depend WLB will not function in XenServer version 6.2 and higher. See CTX137333
Some administrative tasks you may want to perform on Workload Balancing include:
You can also administer the Workload Balancing virtual appliance using the Workload Balancing service commands. These commands let you determine Workload Balancing virtual appliance status, change user accounts, and increase logging detail. For information about these commands, see the Workload Balancing Administrator's Guide
Note: For information about configuring Workload Balancing to use a different certificate or configuring XenServer to verify the identity of a certificate, see the Workload Balancing Administrator's Guide.