I have an app with facebook integrated. it works fine when i run it from eclipse but after signing the application i get this error

```
 Login failed: invalid_key:Android key mismatch.
Your key "JGn9F2vDQ/w6hexLxdefCUpxYIA" does not match the allowed keys specified in your application settings.
Check your application settings at http://www.facebook.com/developers

```

I have checked key hash generated by my application and one on www.facebook.com/developers is same. Please help!