ORA-03121: No interface driver connect

Hi there,
can anybody solve my problem? i have installed Personal Oracle8 and then i installed Developer 2000 forms 4.5.
Now i am trying to connect with Oracle 8 from developer but it is showing ORA-03121 error.
when i check the error detail, it says Net8 driver not load in memory or there is mismatch of version.
one thing noticible that i have SQL*PLUS 8 and SQL*PLUS 3.2 both installed .
i want to be able to connect with database from Developer so that i can run form.
Any kind of help or advice from you professionals will be extremely helpful.
Regards
Abid Malik

To start the listener from command line issue lsnrctl start.
To configure SQLNET use the SQLNET easy config utility that came with the Forms installation.
More info:
http://www.orafaq.org/faqnet.htm

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