maptools and rgeos

I am trying to install the package Rgeos after?????????????????????????????r-forge. However, it gives me the following information. Could you help me?

utils:::menuInstallLocal()

Error in gzfile(file, "r") : cannot open the connection
In addition: Warning messages:
1: In unzip(zipname, exdir = dest) : error 1 in extracting from zip file
2: In gzfile(file, "r") :
 cannot open compressed file 'rgeos_0.0-10.tar.gz/DESCRIPTION', probable reason 'No such file or directory'





<quote author='Ben Madin'>
G'day all,

Please excuse my not finding this, but having just upgraded maptools, there
appears to be some issue over gpclib - not looking for trouble, I installed
rgeos from r-forge, and it seems to be loadable, but loading maptools I
still get the following message.

library(rgeos)

Loading required package: sp
GEOS runtime version: 3.2.0-CAPI-1.6.0 

library(maptools)

Loading required package: foreign
Loading required package: lattice

	Note: polygon geometry computations in maptools
	depend on the package gpclib, which has a
	restricted licence. It is disabled by default;
	to enable gpclib, type gpclibPermit()

Checking rgeos availability as gpclib substitute:
FALSE 

Have I missed something on installation?(I'm using William Kyngesbury's GEOS
Frameworks)

cheers

Ben



sessionInfo()
R version 2.10.1 Patched (2010-02-01 r51089) 
x86_64-apple-darwin9.8.0 

locale:
[1] en_AU.UTF-8/en_AU.UTF-8/C/C/en_AU.UTF-8/en_AU.UTF-8

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] maptools_0.7-34 lattice_0.18-3  foreign_0.8-40  rgeos_0.0-9    
sp_0.9-62      

loaded via a namespace (and not attached):
[1] grid_2.10.1  tools_2.10.1