The tengwar spelling depends on the language it represents.

Since the phrase you want to transcribe an English text, you must inform
the program by choosing the right option

The transcription the program did for you was set on the default option
which was 'Quenya' and the result almost didn't make sense. You must
find the option (must be in the toolbar) and select 'English'

Also, since your name is not English, perhaps you should spell it
accordingly to facilitate the program. If your name 'Andreau' is
pronounced 'Andro' or 'Andru' you should type it that way

You can also use online application found in
http://tengwar.art.pl/tengwar/ott/english.php

You can select 'PNG' as an export option, which is a generated Image
file, and send us the direct link. It will be easier for you