Praise be to Allah.
There is no saheeh evidence (daleel) to indicate that we should recite al-Faatihah one hundred times when asking Allaah for anything, so it is not permissible to do this. You must follow the Sunnah and call on Allaah by His names and attributes, as he says (interpretation of the meaning): “And (all) the Most beautiful Names belong to Allaah, so call on Him by them…” [al-A’raaf 7:180]. As regards Soorat al-Faatihah, it is the greatest soorah of the Qur’aan, so recite it whenever you wish, without specifying a certain number of times or a certain way of reciting it that has no basis in Islam. May Allaah help us and you to do all good.