SSL UF8 - cubase plugin control

Hi
I need some advice please. Just bought a SSL UF8 for myself. I got it integrated with Cubase without any issue.
When I use the plugin function using Plugin button, for the selected track, it straight away shows the plugin which is on insert one position. Using page 2 I can control the parameters ok.
However I cannot switch to other plugins (ie insert two and beyond positions). It always shows plugin at the first position.
Any advice please?

Thank you
Harsha