[R] cloud() works but wireframe() is blank

[Alexander Nervedi]

I have to be making a riddiculously silly ommission.
when I run the fillowing i get the cloud plot ok. But I cant figure out what 
I am missing out when I call wireframe.

Any help would be appreciated.

x<-runif(100)
y<-rnorm(100)
z<-runif(100)

temp <-data.frame(x,y,z)
wireframe(x~y*z,temp)
cloud(x~y*z,temp)