None - total letdown

Have this product for just under 6, in March 2014 - Stable to 2017, acquired.
In mid-March started at intervals of about 5 days with seeding (in the house). The whole 5 times.
Result: not a single SAAT went to!
I prefer for many years successfully tomatoes from seed - so I am not too stupid to do so. This variety I want to draw on the basis of positive reports concerning the (almost) resistance to late blight for the first time.
In parallel with the seed of DÜRR I have sown the same variety from a different vendor.
Due to the high price of seeds in both cases, only 1 seed per pot cultivation. In the product of another vendor each grain has sprouted!
I have shared my experience even the producers Dürr. Result? The same as with the seed: NO RESPONSE.