ORA-12541 TNS No listener with pl/sql developer

[malakay79]

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

So what can be the problem?

 

[Marco Kalter]

Maybe this an environment problem. Can you go to Help > Support Info, press the 'Copy all pages' button on this info screen, and paste this text into an e-mail reply?

 

[malakay79]

there is no Help > Support Info in my pl/sql developer version 5.1.6.747

 

[malakay79]

and i don't have this proble if I use oracle 9i client

 

[Marco Kalter]

In 5.1.6 you need to go to Help > About, press the Info (i) button, and press the 'Copy all pages' button on this info screen.

But if the 9i client works okay, then I assume that there is a tnsnames configuration issue with the other client.