problems with scalefactors and spherical coordinates

Hi,


  im doing the following:

(C1) load(vect);
(D1) 	    /home/charles//share/maxima/5.9.0/share/vector/vect.mac
(C2) 
scalefactors([[r*sin(theta)*cos(phi),r*sin(theta)*sin(phi),r*cos(theta)],r,phi,theta]);

Error: MACSYMA-TOP-LEVEL [or a callee] requires more than one argument.
Fast links are on: do (si::use-fast-links nil) for debugging
Error signalled by MACSYMA-TOP-LEVEL.
Broken at MACSYMA-TOP-LEVEL.  Type :H for Help.
MAXIMA>>


why scalefactors is going wrong like this? i have restarted maxima before 
trying this


P.D.: AFAIK the way to do calculations and 3dplots in spherical coordinates 
requires the vect package, is that correct?

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