Spring RTS Engine

yep its the dual core pentium d... i tried to turn threaded optimization off and FPS does not change <.<

I surfed up the whole forum and I really dont know how to handle this...
I play with lowest details and get about 5 FPS with just a Commander at the beginning...

Intel Pentium D 2,8 Ghz
Geforce 6600 256MB
2048 MB-RAM

Can anyone help me? TT