Dimension PRO and X1 Expanded

Hi I am using Sonar X1 Expanded and have recently learned there is more to DIM PRO than i knew before What the problem is - on the EG it states you can press S for sustain and L for a loop point, It does not work - i have to use Shift and S for it to sustain and when i press L it toggles X1 Loop rather than DIM PRO I am using PC version??/ any ideas Thanks