How to write a proper if statement in a batch file? Mine crashes when it reaches the "if" statement

I'm trying to speed up workflow in my lab and I'm basically just trying to ask whether the user already has a config or if it needs to be created, if yes it should move on, and if not then it should do what's in the if statement. However, when it reaches this if statement it crashes no matter how I've changed it. What's going wrong?

mkdir VinaOutput
set /P conf=Do you already have a config file? (Y/N)
echo %conf%
if /I "%conf%" EQU "N"(
    set /P rec=Enter Receptor:
    set /P ligand=Enter Ligand:
    set /P cenX=Enter Center_X:
    set /P cenY=Enter Center_Y:
    set /P cenZ=Enter Center_Z:
    set /P sizeX=Enter Size_X:
    set /P sizeY=Enter Size_Y:
    set /P sizeZ=Enter Size_Z:

    echo receptor = %rec%.pdbqt > %CD%\VinaOutput\conf.txt
    echo ligand = %ligand%.pdbqt >> %CD%\VinaOutput\conf.txt
    echo center_x = %cenX% >> %CD%\VinaOutput\conf.txt
    echo center_y = %cenY% >> %CD%\VinaOutput\conf.txt
    echo center_z = %cenZ% >> %CD%\VinaOutput\conf.txt
    echo size_x = %sizeX% >> %CD%\VinaOutput\conf.txt
    echo size_y = %sizeY% >> %CD%\VinaOutput\conf.txt
    echo size_z = %sizeZ% >> %CD%\VinaOutput\conf.txt
    echo out = vina_output.pdbqt >> %CD%\VinaOutput\conf.txt
    echo log = log.txt >> %CD%\VinaOutput\conf.txt
)
pause```