google OAuth redirect_uri does not return code param
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I registered server app with google with 2 redirect uri: `http://mydomain/oauthcallback` and `http://mydomain/oauthcallback/default.aspx`.
If I call second one, I get code param back and it works nicely.  But if I call for the first redirect_uri (with approriate client secret and other values), google returns no parameters at all (no code, no error, no nothing).

What could be the problem?