Ubuntu 9.10 have reached end of life (EOL), you should consider upgrading. It will also solve your problem, at least it should, because your app will already have a recent version, no need to compile a new one.
The release following 9.10 is 10.04, it is a long term release, you can stop there to have a supported version, but upgrading to 11.04 is the best idea.
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