Hi TikoSS,
I'm not sure that you should have added anything to your database even though the SQL file was included in the download. The instructions did not mention that this needed to be done. That said, I tried to install the contribution without the database addition and get exactly the same errors you have. I think that there is an error in the downloaded files somewhere.
I hope that the author of the contribution will know what went wrong, but I will try and fix this and if I can I'll post the fix here.