Transmission

It is strange, but Transmission is using only one core of my 2 core CPU.
Do I need to compile it in some special way to balance the load?

The issue:
Core 1 load 9,5% while Core 2 load is zero..


Tasks: 80 total, 1 running, 79 sleeping, 0 stopped, 0 zombie
Cpu0 : 9.5%us, 6.5%sy, 0.0%ni, 82.9%id, 0 ...