Elhanan,
I had the same issue. I was running Oracle 9i and had to modify the settings
in the Oracle Net Manager in the Oracle 10g home and modify the settings in
Service Naming node.
HTH
"Elhanan" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> hi..
>
> i downloaded oracle's Dotnet Developer pack for dotnet studio
>
> not i get add connection window, i specify in the datasource my
> database name,and in the user/password, etc..
>
> when i try to connect i get ora-12154, what am i missing?
>
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