problems with lda , data included, can somebody test with the new version

enclosed a simple R script (and a data file, and the output) , with
calls lda similar to the example with the iris data in the
documentation. it is not working and i dont understand the error
message. can anybody help me? i am using R 1.5.1 (2002.06.17) on
debian woody stable. 

I would like to avoid updating now, because i want to keep the system
in "stable". can somebody test, if the newer version didnt have this
problem ? thanks

------ data ---------------
"diagonal.moment" "cluster.shade" "histogram.kurtosis" "assignment"
"1" 91.966025 -11402.735755 -0.113658 "5"
"2" 87.216671 -13892.812239 -0.106662 "5"
"3" 94.23765 -12397.68244 -0.110086 "5"
"4" 120.130753 -17229.165583 -0.119237 "5"
"5" 84.952756 -13024.921078 -0.110119 "5"
"6" 97.635587 -11984.989519 -0.103907 "5"
"7" 60.416425 -8641.988229 -0.116222 "5"
"8" 84.79081 -12332.977083 -0.1091 "5"
"9" 78.408806 -11373.916988 -0.112666 "5"
"10" 137.415571 -18491.889203 -0.118939 "5"
"11" -10.156979 -1495.884639 -0.104795 "5"
"12" 92.383809 -11601.060884 -0.11422 "5"
"13" 147.584707 -19084.747951 -0.120416 "6"
"14" 146.609465 -21629.814571 -0.121656 "6"
"15" 143.91174 -19878.044959 -0.118049 "6"
"16" 177.170923 -26024.777287 -0.121526 "6"
"17" 134.00609 -18110.76336 -0.118185 "6"
"18" 138.793062 -18347.029573 -0.121952 "6"
"19" 125.658219 -16204.88335 -0.119324 "6"
"20" 99.369435 -14246.410482 -0.122442 "6"
"21" 154.763888 -21116.0578 -0.120623 "6"
"22" 127.359594 -17490.575516 -0.120079 "6"
"23" 136.568559 -18329.619348 -0.121503 "6"
"24" 127.983753 -16243.10434 -0.121176 "6"
-----
script:
library(MASS)
actaData<-read.table("actaData.dat")
actaData

ass<-actaData$assignment
print(ass)
tass<-table(ass)
print(tass)
#print(attributes(tass))
priodim<-attr(tass,"dim")
prio=c(rep(1,priodim))/priodim
print(prio)

actaData
z<-lda(assignment ~ .,actaData,prior=prio,tol=1.0e-08)
--- end script---
start output:

end output

print(dim(actaData))

[1] 24  4

ass<-actaData$assignment
print(ass)

[1] 5 5 5 5 5 5 5 5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6

tass<-table(ass)
print(tass)

ass
 5  6 
12 12

#print(attributes(tass))
priodim<-attr(tass,"dim")
prio=c(rep(1,priodim))/priodim
print(prio)

[1] 0.5 0.5

actaData

diagonal.moment cluster.shade histogram.kurtosis assignment
1         91.96603    -11402.736          -0.113658          5
2         87.21667    -13892.812          -0.106662          5
3         94.23765    -12397.682          -0.110086          5
4        120.13075    -17229.166          -0.119237          5
5         84.95276    -13024.921          -0.110119          5
6         97.63559    -11984.990          -0.103907          5
7         60.41642     -8641.988          -0.116222          5
8         84.79081    -12332.977          -0.109100          5
9         78.40881    -11373.917          -0.112666          5
10       137.41557    -18491.889          -0.118939          5
11       -10.15698     -1495.885          -0.104795          5
12        92.38381    -11601.061          -0.114220          5
13       147.58471    -19084.748          -0.120416          6
14       146.60947    -21629.815          -0.121656          6
15       143.91174    -19878.045          -0.118049          6
16       177.17092    -26024.777          -0.121526          6
17       134.00609    -18110.763          -0.118185          6
18       138.79306    -18347.030          -0.121952          6
19       125.65822    -16204.883          -0.119324          6
20        99.36943    -14246.410          -0.122442          6
21       154.76389    -21116.058          -0.120623          6
22       127.35959    -17490.576          -0.120079          6
23       136.56856    -18329.619          -0.121503          6
24       127.98375    -16243.104          -0.121176          6

z<-lda(assignment ~ .,actaData,prior=prio,tol=1.0e-08)

Error in scale(group.means, center = xbar, scale = FALSE) : 
	unused argument(s) (center ...)
Execution halted

#-----------------------------------------
### output from R --version
R 1.5.1 (2002-06-17).
Copyright (C) 2002 R Development Core Team

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under the terms of the GNU
General Public License.  For more information about these matters,
see http://www.gnu.org/copyleft/gpl.html.

-------------------

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