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ORA-12541 TNS No listener with pl/sql developer

599614Nov 15 2007 — edited Nov 15 2007

I have an oracle database 10.2.0.1.0 on windows 2003 server 64 bit.

And I have a client. In my client there is installed pl/sql developer.
When I try to connect to the dataaase with pl/sql developer I recivied this message:
ORA-12541 TNS No listener

but the lister is on.
I'm able to connect in my client with sqlplus: conn system/password@alias
and I'm able to use sql developer

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Locked on Dec 13 2007

Added on Nov 15 2007

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