Dates plotting backwards

Hello,

I am having a little trouble formatting my dates correctly. When I plot
something using the following commands, R plots the most recent date on the
left of the figure and then earlier date on the right of the figure. Given
that English is read from left to right I would like to have the dates on my
figure arranged in the same way.  I am sure that this is something fairly
simple but I was wondering if someone could help me out. Here is a minimal
example that should reproduce my problem. I've also included so data
thinking that perhaps my data format was the problem.

Thanks in advance!

Sam

Date=as.Date(test$Date, format= "%d/%m/%Y")
plot(test$D.2D50.SA ~ test$Date)

"Date","D.2D50.SA"
28/08/2009,60.67
28/08/2009,66.4
28/08/2009,50.19
28/08/2009,38.19
28/08/2009,50.19
12/09/2009,62.2
12/09/2009,93.77
12/09/2009,49.89
12/09/2009,106.34
12/09/2009,42.22
22/09/2009,24.15
22/09/2009,105.17
22/09/2009,15.04
22/09/2009,23.54
22/09/2009,19.6
05/10/2009,74.41
05/10/2009,34.78
05/10/2009,28.74
05/10/2009,41.29
05/10/2009,42.68
12/10/2009,46.26
12/10/2009,13.31
12/10/2009,29.95
12/10/2009,34.28
12/10/2009,74.51
19/10/2009,33.67
19/10/2009,69.86
19/10/2009,61.3
19/10/2009,21.38
19/10/2009,80.37
26/10/2009,20.69
26/10/2009,63.37
26/10/2009,70.91
26/10/2009,22.7
26/10/2009,23.89

-- 
*****************************************************
Sam Albers
Geography Program
University of Northern British Columbia
3333 University Way
Prince George, British Columbia
Canada, V2N 4Z9
phone: 250 960-6777
*****************************************************

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