TOAD hangs with ORACLE8i PE on WIN98

[Quoted] [Quoted] I have a ORACLE 8i server- and a 8.0.6 client-installation (from designer 6i install) on Windows98 SP2.
SQLPLUS 8.1.6 and SQLPLUS 8.0.6 are able to connect without (only 8.1.6) or with connectstring (with thanks to Sybrand): with SQLPLUS 8.1.6

   SQL> connect scott/tiger
   Connected
   SQL> connect scott/tiger_at_dbfirst81    Connected
with SQLPLUS 8.0.6

   SQL> connect scott/tiger_at_dbfirst80    Connected

To distinguish in TOAD I named them different.

But when I try to connect with TOAD it always hangs.

There is no TNS_ADMIN-entry in my registry! I tried to use TOAD_HOME, but the same procedure as everytime!

What do I do wrong?
Can anyone explain?

   Reinhard

• my listener.ora for ORACLE8i-Server: LISTENER = (DESCRIPTION_LIST = (DESCRIPTION =
  (ADDRESS_LIST =
  (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0)) ) ) ) SID_LIST_LISTENER = (SID_LIST = (SID_DESC =
  (GLOBAL_DBNAME = DBFIRST)
  (ORACLE_HOME = c:\Oracle\Ora817)
  (SID_NAME = DBFIRST)
  (SERVICE_NAME = DBFIRST)
  ) )
• my tnsnames.ora for ORACLE8i-Client: DBFIRST81 = (DESCRIPTION = (ADDRESS_LIST =
  (ADDRESS = (PROTOCOL = IPC)(KEY = extproc0))
  ) (CONNECT_DATA =
  (service_name = dbfirst)
  ) )
• my tnsnames.ora for ORACLE80-Client: DBFIRST80 = (DESCRIPTION = (ADDRESS_LIST =
  (ADDRESS = (PROTOCOL = IPC)(KEY = extproc0))
  ) (CONNECT_DATA =
  (service_name = DBFIRST)
  (GLOBAL_NAME = DBFIRST)
  ) )
• both sqlnet.ora: NAMES.DIRECTORY_PATH=(TNSNAMES,ONAMES)

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