Mschart - display 2 line which are refer to different Y axis value

Hi all,

I have a mschart. How could display 2 lines which are refer to different Y axis value.Example, Line1 is represent Temperature (value range from 0 to 1000), Line2 is represent PH (value range from 1 to 14). In chart,Line1 is plot according the scale of Temp.Then Line2 is plot according scale of Temp.

Any idea about this?I have try to manually control the scale properties,but i cant find a way to control it.

Any tips are welcome


regards
lswang