catalog database on the system problem

[xixi]

i have been tring to add a new catalog system on my local machine
control center from remote server, after i create the host and node, i
try to catalog the database, then when i try to access it, it gives me
the error IBM][CLI Driver] SQL30061N The database alias or database
name
"NJIPD " was not found at the remote node. SQLSTATE=08004

i don't have this problem when i catalog the system right after i
install db2 server, without put on fix pack, after i put on fix pack,
i can never catalog the remote database anymore, so everytime i have
to uninstall db2, reinstall db2, catalog remote server, then put the
fixpack, can someone told me any other way to fix it? thanks