Hi,
Besides what Mr. Kosheba recommended, I would suggest you to review and edit (if required) the properties of the material mold.
It is a known fact that there is a large difference in the properties of commercial grades of available P20, this was published in an ANTEC paper several years ago and it is listed in the training manuals. The difference I am referring to are thermal conductivity which will affect significantly the results of the cooling analysis.
From a quick search on internet I found that the mold material you are using (1, 2738) seems to be listed as P20+Ni, http://www.imould.com/products/Stamping+Die+Moulds/judyyf/Mould+steel+(P20%2BNi/718/DIN1.2738)-18229.html
So, you could review your mold material properties sheet and adjust as necessary.
Regards,
Ana Maria