Well, both forms that you have given contain a mistake. However, as far as I understand your question :) you want to know the difference, so Past Participle is one of the verb forms and the Past Simple is a tense. The first is used in various structues and tenses <the passive, causative get/have, perfect tenses etc.>, the second is used to describe a single, completed action in the past.
Hope it's useful.
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