[BioC] problems with gcrma just.gcrma

[Elisabetta Manduchi]

Hello,
I'm trying to use just.gcrma with data from Affy MGU74Av2 and am getting 
the error at the bottom of what's copied below re read.probematrix. I'm 
running version 2.4.0 of R and gcrma version 2.6.0. The mgu74av2 packages 
being downloaded are version 1.14.0.
Can anybody advice on what I can do to overcome this?
Thanks,
Elisabetta
---
> data.gcrma<-just.gcrma(filenames=cel.files, type=c("fullmodel"), normalize=T, optimize.by=c("memory"), fast=T, samepleNames=sample.names)

Computing affinities[1] "Checking to see if your internet connection 
works..."
trying URL 
'http://bioconductor.org/packages/1.9/data/annotation/bin/windows/contrib/2.4/mgu74av2cdf_1.14.0.zip'
Content type 'application/zip' length 1340750 bytes
opened URL
downloaded 1309Kb

package 'mgu74av2cdf' successfully unpacked and MD5 sums checked

The downloaded packages are in
         C:\Documents and Settings\Elisabetta Manduchi\Local 
Settings\Temp\Rtmpc7v1qb\downloaded_packages
updating HTML package descriptions
[1] "Checking to see if your internet connection works..."
trying URL 
'http://bioconductor.org/packages/1.9/data/annotation/bin/windows/contrib/2.4/mgu74av2probe_1.14.0.zip'
Content type 'application/zip' length 2396326 bytes
opened URL
downloaded 2340Kb

package 'mgu74av2probe' successfully unpacked and MD5 sums checked

The downloaded packages are in
         C:\Documents and Settings\Elisabetta Manduchi\Local 
Settings\Temp\Rtmpc7v1qb\downloaded_packages
updating HTML package descriptions
.Done.
Error in read.probematrix(filenames = filenames, which = "pm", cdfname = 
cdfname) :
         VECTOR_ELT() can only be applied to a 'list', not a 'symbol'
---