Global Groovy scripts usage question

Hello,
I am trying to understand how the global groovy feature works but am having some problem. I tried the example and it worked fine. I then modified your Greet.groovy to the following.

package soapui.demo
class Greet
{
  def salute()
  {
log.info("testing")
  }
}

I then create a groovy script containing
def greet = new soapui.demo.Greet( "Ole", log )
greet.salute()

and the response has
'Hello Ole'

Shouldnt response have 'testing'

Also if i define greet as
def greet = new soapui.demo.Greet( )
I get groovy.lang.GroovyRuntimeException: Could not find matching constructor for: soapui.demo.Greet()

Shouldn't this be ok (based on my java knowledge)

THanks

Ali