Try this, D76 @ 18 degree C, for 14 n half min. fixer @ 18 degee C or bellow.(posted 8669 days ago)Just to check where its going wrong, ask the local color printer to print some MONOCOLOR prints of the same 5x7 size from your B/W negatives.
one more thing, tri Tmax 100 for finer grain than TriX Thanks shreepad