unfortunately doesnt work.
but if you want to create a spinning object do the following:
1.) create a brush that you want to be rotating, make it a func_physbox,
give it a name
2.) create a phys_motor entity
3.) make the attached object the brush of number 1.)
4.) place the motor entity exactly over the middle of ur brush
5.) there should be a little circle in the middle of the phys_motor entity which u then pull though the middle of ur brush of number 1.)
6.) now u are done and can change for example the rotation speed etc. double clicking the phys_motor entity