Since I do not know you or your level of experience the first thing I would do is have both animals re-sex by another party. Again male will lock until one day they decide their won't anymore (been there done that)
I have seen male and female trashing in the cage upon introduction as if two males were put with each others but it is rare I have only seen it once in my collection over the last decade and I have pair a few during that time.
Female that are gravid (have ovulated) will no longer lock but this does not affect their behavior.