Missing progressive taxi

Hi,

I have a slight problem.
I've just upgraded my system with great results 🙂 But now the the yellow arrows showing the assigned taxiroute is gone.

I'm using FSX with acceleration and just bought REX 2.0. Since I installed both products at the same time I don't know if it's REX that causes the problem.

Any idea?

My system:
2,8 GHz i7 quad core
6 Gb mem
Radeon HD 5850 1Gb