[BioC] Rsamtools installation error

[Murli [guest]]

Hi, 
I am trying to install Rsamtools (Redhat linux ) and I have been getting the following error
#######################################
** testing if installed package can be loaded
Error in dyn.load(file, DLLpath = DLLpath, ...) : 
  unable to load shared object '/usr/local/lib64/R/library/Rsamtools/libs/Rsamtools.so':
  /usr/local/lib64/R/library/Rsamtools/libs/Rsamtools.so: undefined symbol: gzopen64
Error: loading failed
Execution halted
ERROR: loading failed
* removing ‘/usr/local/lib64/R/library/Rsamtools’
#########################################

I have libz installed 
/sbin/ldconfig -p|grep libz
        libz.so.1 (libc6,x86-64) => /lib64/libz.so.1
        libz.so.1 (libc6,x86-64) => /usr/lib64/libz.so.1
        libz.so.1 (libc6) => /lib/libz.so.1
        libz.so.1 (libc6) => /usr/lib/libz.so.1
        libz.so (libc6,x86-64) => /lib64/libz.so
        libz.so (libc6,x86-64) => /usr/lib64/libz.so
        libz.so (libc6) => /lib/libz.so
        libz.so (libc6) => /usr/lib/libz.so

I checked the LD_LIBRARY_PATH using the following
R CMD env | grep LD_LIBRARY_PATH
LD_LIBRARY_PATH=/usr/local/lib64/R/lib:/usr/local/lib64:/usr/lib/jvm/java-1.6.0-sun-1.6.0.31.x86_64/jre/lib/amd64/server:/usr/lib/jvm/java-1.6.0-sun-1.6.0.31.x86_64/jre/lib/amd64

Please let me know if there is anything else that I need to check. 
Thanks for your help. 
Cheers../Murli




 -- output of sessionInfo(): 

sessionInfo()
R version 2.15.0 (2012-03-30)
Platform: x86_64-unknown-linux-gnu (64-bit)

locale:
 [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C              
 [3] LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8    
 [5] LC_MONETARY=en_US.UTF-8    LC_MESSAGES=en_US.UTF-8   
 [7] LC_PAPER=C                 LC_NAME=C                 
 [9] LC_ADDRESS=C               LC_TELEPHONE=C            
[11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C       

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

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