Problem to install Kubuntu 11.04 (WUBI) for Windows 7 operating system

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When I tried to install Kbuntu 11.04 (WUBI.EXE) in drive-D on Windows 7 platform - Windows 7 installed in drive-C, I received some problem at that time to install the software. I have used 1.0 TB hard disk and partitioned as 6 drivers. I have interested to use Kubuntu software in my system. Please give your suggestions to solve the problem. The problem is as follows (as per the log file):-

>>stdout=
09-21 18:43 DEBUG TaskList: # Cancelling tasklist
09-21 18:43 DEBUG TaskList: New task modify_bcd
09-21 18:43 ERROR root: Error executing command
>>command=C:\Windows\System32\bcdedit.exe /set {c5a8f7af-e225-11e0-9e71-a71a88c27c0b} device partition=D:
>>retval=1
>>stderr=An error has occurred setting the element data.

The request is not supported.


>>stdout=
Traceback (most recent call last):
File "\lib\wubi\application.py", line 57, in run
File "\lib\wubi\application.py", line 129, in select_task
File "\lib\wubi\application.py", line 195, in run_cd_menu
File "\lib\wubi\application.py", line 119, in select_task
File "\lib\wubi\application.py", line 157, in run_installer
File "\lib\wubi\backends\common\tasklist.py", line 197, in __call__
File "\lib\wubi\backends\win32\backend.py", line 651, in modify_bcd
File "\lib\wubi\backends\common\utils.py", line 62, in run_command
Exception: Error executing command
>>command=C:\Windows\System32\bcdedit.exe /set {c5a8f7af-e225-11e0-9e71-a71a88c27c0b} device partition=D:
>>retval=1
>>stderr=An error has occurred setting the element data.

The request is not supported.


>>stdout=
09-21 18:43 DEBUG TaskList: New task modify_bcd
09-21 18:43 DEBUG TaskList: New task modify_bcd
09-21 18:43 DEBUG TaskList: New task modify_bcd
09-21 18:43 DEBUG TaskList: New task modify_bcd
09-21 18:43 DEBUG TaskList: ## Finished modify_bootloader
09-21 18:43 DEBUG TaskList: # Finished tasklist