Link creation fails--seamonkey upgrade

[sandlynx]

I just downloaded and upgraded from seamonkey 2.0.8 to 2.0.9. It installed ok, but when I tried to create the symbolic link to the menu, it failed, just like my attempt to create a link when upgrading thunderbird failed (last week).
Here's the code I used:

Link not working:
Konsole output:

root@darkstar:/usr/lib/seamonkey-2.0.9# ln  -sf /usr/lib/seamonkey-2.0.9/seamonkey  /usr/bin/seamonkey
root@darkstar:/usr/lib/seamonkey-2.0.9# exit
exit
sandy@darkstar:~$ cd  /usr/lib/seamonkey-2.0.9/seamonkey
sandy@darkstar:/usr/lib/seamonkey-2.0.9/seamonkey$ ./seamonkey  ---It comes up and works fine.
sandy@darkstar:/usr/lib/seamonkey-2.0.9/seamonkey$ su
Password:
root@darkstar:/usr/lib/seamonkey-2.0.9/seamonkey# exit
exit
sandy@darkstar:/usr/lib/seamonkey-2.0.9/seamonkey$ ./seamonkey
sandy@darkstar:/usr/lib/seamonkey-2.0.9/seamonkey$
sandy@darkstar:~/Downloads/seamonkey-2.0.9/seamonkey$ ./seamonkey
sandy@darkstar:~/Downloads/seamonkey-2.0.9/seamonkey$

----It comes up and works fine here too.
I have a copy in my home directory and in the proper place, /usr/lib, and both come up and work fine. It's just that when I tried to create the link in /usr/lib/seamonkey-2.0.9, that the link did not go to the menu.
I'm using the same code I used when I upgraded firefox, seamonkey to 2.0.0.8 and those links were created without a problem.
What seems curious to me is that is can run both /usr/lib/seamonkey-2.0.9/seamonkey and /home/sandy/Downloads/seamonkey-2.0.9/seamonkey as "sandy", not as root. Does anyone know what the problem is?