Voltage Controlled Resistor Problem

Hi all,

First I have to say that I am starting with gnucap and maybe I will  
say some stupid thing.

Well, I want to build a current controlled resistor using the voltage  
controlled resistor circuit.
First I establish a linear relationship between the input voltage and  
the resistor through a table (1V->1k, 2V->2k,...).
Then, I put a current source (1mA) in the output nodes to measure the  
voltage in it.

My code is:

Gnucap 0.35
The Gnu Circuit Analysis Package
Never trust any version less than 1.0
Copyright 1982-2006, Albert Davis
Gnucap comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome
to redistribute it under certain conditions
according to the GNU General Public License.
See the file "COPYING" for details.
gnucap> build

 >.model vvsr table 0,0k,1,1k order=1
 >G1 a 0 VCR b 0 vvsr
 >.VCR Ve a 0 b 0 vvsr
 >Vi b 0 1
 >Io 0 a 1m
 >
gnucap> print dc v(a)
gnucap> dc Vi 0 10 1
#           v(a)
  0.         5.n
  1.         0.5
  2.         1.
  3.         1.5
  4.         2.
  5.         2.5
  6.         3.
  7.         3.5
  8.         4.
  9.         4.5
  10.        5.
gnucap>
As you can see in the results of the simulation, the voltages in the  
output nodes are only half of I expected, for example, for Vi=5 I  
expected Va=5V (R=5k) and I obtain Va=2.5.
What am I doing wrong?

Thanks and sorry for my english...