permission denied

[wwshen@engin.umich.edu]

Hi Guys,
   It seems that I have installed and started the arla and
kerberose successfully. But when I run the arla to read the
file I get the permission denied. The following is what I
have done:

First to run the arlad I input the following:

	iceaxe# /usr/arla/bin/mount_xfs /dev/xfs0 /arla
	iceaxe# /usr/arla/bin/arlad

Then I typed the following:

	iceaxe# cd /usr/athena/bin
	iceaxe# ./kauth wwshen at UMICH.EDU
	wwshen at UMICH.EDU's Password: 
	kerberos-iv/* unknown service, using default port 750
	iceaxe# cd /arla/umich.edu/user/w/w/wwshen
	iceaxe# ls -l
	ls: .Xauthority: Permission denied
	ls: .addressbook: Permission denied
	ls: .addressbook.lu: Permission denied
	ls: .pine-debug1: Permission denied
	ls: .pine-debug2: Permission denied
	ls: .pine-debug3: Permission denied
	....
	iceaxe# ./klist
	Ticket file:    /tmp/tkt_root_42614
	Principal:      wwshen at UMICH.EDU

	  Issued           Expires          Principal
	Jul  7 16:21:34  Jul  8 02:21:34  krbtgt.UMICH.EDU at UMICH.EDU
	Jul  7 16:21:35  Jul  8 02:21:35  afs at UMICH.EDU


   Could you tell me why I can not access my file in
UMICH.EDU cell? Thanks a lot.
best
Wuwei