Hi all,
I have just installed R version 2.13.0 on a windows 7 machine but don't seem
to be able to install some packages from bioconductor. The culprit may be
package XML namespace. Below are details while trying to install package
ArrayExpress. Important to note that a similar error occurs when I try to
install GEOquery.
Please, any ideas shall be much appreciated

> biocLite('ArrayExpress')
Using R version 2.13.0, biocinstall version 2.8.4.
Installing Bioconductor version 2.8 packages:
[1] "ArrayExpress"
Please wait...

Installing package(s) into ‘C:/Users/Teku/Documents/R/win-library/2.13’
(as ‘lib’ is unspecified)
trying URL '
http://bioconductor.org/packages/2.8/bioc/bin/windows/contrib/2.13/ArrayExpress_1.12.0.zip
'
Content type 'application/zip' length 217981 bytes (212 Kb)
opened URL
downloaded 212 Kb

package 'ArrayExpress' successfully unpacked and MD5 sums checked

The downloaded packages are in
        C:\Users\Teku\AppData\Local\Temp\RtmpKMihJ3\downloaded_packages
> library(ArrayExpress)
Error : package 'XML' does not have a name space
Error: package/namespace load failed for 'ArrayExpress'
> sessionInfo()
R version 2.13.0 (2011-04-13)
Platform: i386-pc-mingw32/i386 (32-bit)

locale:
[1] LC_COLLATE=Finnish_Finland.1252  LC_CTYPE=Finnish_Finland.1252
[3] LC_MONETARY=Finnish_Finland.1252 LC_NUMERIC=C
[5] LC_TIME=Finnish_Finland.1252

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

other attached packages:
[1] Biobase_2.12.1

loaded via a namespace (and not attached):
[1] tools_2.13.0

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