The imageSlider tv needs to be set as a radio option, and in the input for that tv you'll need to enter Yes==1||No==0 to get it to show yes and no radio buttons.
Make sure to attach the TV to the template you're using.
Then, in the resource you want the slider on, check that TV as yes.
You don't need the brackets in the If call for the TV. (&subject)
Additionally, I assume the markup surrounding the If call is different for the image and the slider, so I'd suggest using chunks for each instead of just the imageTv for the image only. Take your markup for the slider, make a chunk. Same for the image, and call the imageTV in the in that chunk.
Edit: I think I made a mistake in the If call, it should have an additional parameter &subject:
[[!If? &subject=`yesNoTV` &operator=`EQ` &operand=`1` &then=`[[$sliderChunk]]` &else=`[[$imageChunk]]`]]
[ed. note: frogabog last edited this post 13 years, 2 months ago.]