Hmm.. translating requires a basic knowledge of a language and the grammatical structure. Translating letter by letter wouldn't be correct in any language, and Tolkien's languages are even harder to learn because they are far from complete, they are dead languages and well... the creator of the languages died...
But I am sure you will be able to translate anyway... I'm not sure of your exact problem, but I'm sure if you post again, people will be able to help you out!!