My WinDbg does not have !handle with for args and !process commands

[asd.and.Rizzo]

I have:
WinDbg 6.12.0002.633 x86
Windows 7 SP1 x64

Articles(http://www.codeproject.com/KB/debug/cdbntsd5.aspx) and
docs(with WinDbg) say that I can call:
!process
!handle with 4 parameters.

But WinDbg says:
0:001> !process
No export process found

0:001> !handle 314 ff 123
Unknown type '123'

What I want - see all names of files in File handle types. Like in
article:

kd> !process 0 0
**** NT ACTIVE PROCESS DUMP ****
...
PROCESS fcc77200 SessionId: 0 Cid: 0338 Peb: 7ffdf000 ParentCid:
02c8
DirBase: 079de000 ObjectTable: fccc30c8 TableSize: 74.
Image: notepad.exe
kd> !handle 120 ff fcc77200
processor number 0
PROCESS fcc77200 SessionId: 0 Cid: 0338 Peb: 7ffdf000 ParentCid:
02c8
DirBase: 079de000 ObjectTable: fccc30c8 TableSize: 74.
Image: notepad.exe

Handle Table at e1e5f000 with 74 Entries in use
0120: Object: fcd32448 GrantedAccess: 00120089
Object: fcd32448 Type: (fced7c40) File
ObjectHeader: fcd32430
HandleCount: 1 PointerCount: 1
Directory Object: 00000000 Name: \TripItinerary.txt
{HarddiskVolume1}

What is wrong? What extensions should I load?

I need it because want to get next information - what thread or .NET
AppDomain hold handle preventing file from deletion.

Thanks