[android-developers] problem installing my app on real device

Hello, All

I am developing application using Eclipse. My friend has HTC Hero and
I am trying to run my application on it, but it says that the
application could not be installed.
I did the steps which are described in Android DevGuide. I.e. exported
my app with the generated key.
Am i right assuming that this is enough? As i understand eclipse signs
and aligns application automatically when selecting Export.

my app uses sdk version 3 i.e. 1.5

Thanks in advance.

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