TNS 12545 urgent !!

I have my Oracle 9i database running on my XP box. I can connect to it
from Solaris 5.8. I am able to connect from sqlplus. But during a
install, script is not able to establish connection. My sqlnet.log

Fatal NI connect error 12545, connecting to:
 
(DESCRIPTION=(ADDRESS=(PROTOCOL=beq)(PROGRAM=/pinmaster/newtools/oracle_8.1.5/solaris/bin/oracle)(ARGV0=oracle)(ARGS='(DESCRIPTION=
(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))')(DETACH=NO))(CONNECT_DATA=(CID=(PROGRAM=)(HOST=salvo)(USER=deepak))))

  VERSION INFORMATION:
        TNS for Solaris: Version 8.1.5.0.0 - Production
        Oracle Bequeath NT Protocol Adapter for Solaris: Version
8.1.5.0.0 - Production
  Time: 24-NOV-03 18:41:38
  Tracing not turned on.
  Tns error struct:
    nr err code: 0
    ns main err code: 12545
    TNS-12545: Connect failed because target host or object does not
exist
    ns secondary err code: 12560
    nt main err code: 515
    TNS-00515: Connect failed because target host or object does not
exist
    nt secondary err code: 2
    nt OS err code: 0

I can connect using sqlplus from both XP and solaris. That means ip,
port, username, password, SID, service name, etc. are correct. Also
this means my listener and service are running fine on XP. Does the
log point to any potential problems?