[PyMOL] help!

[Sona V. <son...@gm...>]

Hi!
 I am getting the following error when I try to set stick transparency of m=
y=20
object ligand
 PyMOL>set stick_transparency, ligand, 0.7
Traceback (most recent call last):
File "C:\Program Files\DeLano Scientific\PyMOL/modules\pymol\setting.py",=
=20
line 586, in set
v =3D (float(value),)
ValueError: invalid literal for float(): ligand
 Can someone tell me what I am doing wrong.
 Thanks!
 Sona