Curve to Mesh problem

So, i have build 2 simple objects.
I used a curve to build the objects.
The problem is when i exiting the EDIT-MODE blender select both of my object even if they are not connected.
I don’t know why.
I try ALT + C to turn curves into mesh.
I try to use the knife tool and again nothing happened.
Can somebody help me with?

you probably added the second curve while you were in edit mode. if you want them to be seperate, you have to add additional ones in object mode.

You are right!
WOW so there is possible option for cut this right now?

hotkey P in edit mode for ‘seperate selected’

This sloved the problem!
MODRON thank you so much!