OS:
SUSE LINUX 10.1 alpha3 .
steps:
I started all nfsv4 deamons on server.
rpc.mountd
rpc.idmapd
rpc.svcgssd
nfsserver 
exported paths using fallowing options
/export *(rw,fsid=0,insecure,no_subtree_check,sync)
/export  gss/krb5(rw,fsid=0,insecure,no_subtree_check,sync)
/export  gss/krb5i(rw,fsid=0,insecure,no_subtree_check,sync)
/export  gss/krb5p(rw,fsid=0,insecure,no_subtree_check,sync)
I used solaries as nfs client.
dowloaded connectathon testsuite from  fallowing link http://www.connectathon.org/nfstests.html and configured for solaries .
run lock tests for nfs server exported path.

from top directory of connectathon tests  run
./server -l -o vers=3,proto=tcp -p /export -m /mnt1 <serverip>

Results:
Testing native post-LFS locking

Creating parent/child synchronization pipes.

Test #1 - Test regions of an unlocked file.
        Parent: 1.1  - F_TEST  [       0,       1] PASSED.
        Parent: 1.2  - F_TEST  [       0,  ENDING] PASSED.
        Parent: 1.3  - F_TEST  [       0,7fffffff] PASSED.
        Parent: 1.4  - F_TEST  [       1,       1] PASSED.
        Parent: 1.5  - F_TEST  [       1,  ENDING] PASSED.
        Parent: 1.6  - F_TEST  [       1,7fffffff] PASSED.
        Parent: 1.7  - F_TEST  [7fffffff,       1] PASSED.
        Parent: 1.8  - F_TEST  [7fffffff,  ENDING] PASSED.
        Parent: 1.9  - F_TEST  [7fffffff,7fffffff] PASSED.

Test #2 - Try to lock the whole file.
        Parent: 2.0  - F_TLOCK [       0,  ENDING] FAILED!
        Parent: **** Expected success, returned errno=46...
        Parent: **** Probably implementation error.

** PARENT pass 1 results: 9/9 pass, 0/0 warn, 1/1 fail (pass/total).

**  CHILD pass 1 results: 0/0 pass, 0/0 warn, 0/0 fail (pass/total).
lock tests failed

for both nfs version 2 and version 3 this lock tests are failing.