VSA appliance are installed on Windows,Linux guest OS which is running on ESX 5.1 ??
Its a appliance base on Suse OS you install the appliance on the ESXi 5.1
VSA manager is only installable to vCenter which is installed on Windows server ? (vCenter applicance is not usable ?)
VSA Manager should be installed on the vCenter server and its possible only on the windows version of the vCenter