How would I know if you don't provide any information?

Here are some free guesses:

• You have the mod main rendering disabled (M + R)
• You have the schematic rendering disabled (M + G)
• You are in a layer mode such as Single Layer, with the layer set outside of your current placement height range
• You have disabled the Create Placement checkmark in the Load Schematic menu, and you are only loading the schematic to memory, not actually placing it anywhere yet

why?

thanks

working! ty again