Power switch on 2003 Tracker not working!

When I engage the power switch beside the gear shift (not the OD button) I don't get the higher rpms I am supposed at each gear shift point. However, the dash "power" light lights up so the switch itself is ok. Any ideas on what the cause could be would be appreciated.

Thanks in advance.
Ray

2003 4x4 2L 2dr ZR2 Tracker automatic