My newly created TM does not generate translated results in new document to be translated

I am new to Trados Studio. I have done my first document translation using Trados and created my first TM. I have another similar document to translate. I have added this document in my project. However, when I open it to review the translation results that the TM should have generated, I find that there are hardly any matches, when in fact there are so many perfect matches. What am I missing? I have ticked the U{date box and all segments are confirmed and I can see my TM in the TM window.

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