[BioC] ShortRead with BAM

[Duke]

Hi all,

I am totally new to both R and BioConductor, so please be easy on me. I 
just updated my R package to 2.11, and installed new ShortRead package, 
but it seems that I am doing something wrong, and that there is some 
changes from ShortRead 1.5 to 1.6 (like the command format etc...). I 
tried to read a BAM file by creating a file as follow:

library(ShortRead)
sp <- SolexaPath('/Volumes/Data/analysis/glamblia/STATs')
ap <- analysisPath(sp)
(aln0 <- readAligned(ap, "WB4day.bwa.def.bam", "BAM"))

but running the above just gave me the content of dirPath function. My 
package infos is:

 > sessionInfo()
R version 2.11.0 (2010-04-22)
x86_64-apple-darwin9.8.0

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

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

other attached packages:
[1] ShortRead_1.6.0     Rsamtools_1.0.0     lattice_0.18-5
[4] Biostrings_2.16.0   GenomicRanges_1.0.1 IRanges_1.6.0

loaded via a namespace (and not attached):
[1] Biobase_2.8.0 grid_2.11.0   hwriter_1.2   tools_2.11.0

Anybody has any idea?

Thanks,

D.