mpclaim.exe -s -d not working in windows server 2008

[santosh...@gmail.com]

Hi,
I am having a windows server 2008 system.
I have mpio installed on this and i have mapped a lun to this host.
Now, i want to see the load balancing settings and paths (optimized/unoptimized) for the lun.
I tried running the command "c>mpclaim -s -d" but it does not return with the results what i am expecting. the same command works fine in 2008 R2.
Below is what i am getting:
Please help me to know if i am missing something.

C:\Users\Administrator>mpclaim -s -d

Installs MPIO OC and then ensures MSDSM claims passed in device.

Usage: mpclaim reboot_option install_switch device_switch device_hwid(s)

reboot_option Whether to automatically reboot or not
-r automatically reboot without prompting
-n suppress reboot request (CALLER IS EXPECTED TO REBOOT)
install_switch Whether to multipath or remove MPIO support
-i install MPIO OC and add multipath support for device
-u remove multipath support for device and uninstall MPIO
OC if no remaning devices are multipath'd
device_switch Whether to apply above options to all devices or passed-in devic
es
-d following parameters indicate hardware ids of devices
-a work on all applicable devices
-c work on only all SPC3-compliant devices (meaningful only in the
context of install. If used with '-u', it is treated as '-a')
device_hwid HardwareIDs of Devices to be MPIO'd, as strings of vendor8produc
t16,
delimited by a space (Note: Use empty string with '-a' option)