Perennial Phlox Quandary

Trying to grow perennial phlox from seed I bought a packet from Benary, and

went two ways:

1. In a pot with compost and only (temperature about 15 degrees Celsius).

2. One month on compost in the fridge.

As I took the latter from its cool air, the seeds went through the same as in the

first experience, that is, they rotted! Simply melted away...!

What can I do for the last third of my seeds? Please help anyone who made it.