R help - May 2007 - quantreg and sparseM will not load

I have recently started using R and want to use the quantreg (and  
sparseM) packages.

I downloaded the .tar files for each, and placed the subsequent  
folders into the library folder in the frameworks/R.framework/ 
resources/library folder with all the other packages.

When I try to load either package from the package manager window I get:

Loading required package: SparseM
Error in dyn.load(x, as.logical(local), as.logical(now)) :
	unable to load shared library '/Library/Frameworks/R.framework/ 
Versions/2.4/Resources/library/SparseM/libs/i386/SparseM.so':
   dlopen(/Library/Frameworks/R.framework/Versions/2.4/Resources/ 
library/SparseM/libs/i386/SparseM.so, 6): Library not loaded: / 
Library/Frameworks/R.framework/Versions/2.5/Resources/lib/libgfortran. 
2.dylib
   Referenced from: /Library/Frameworks/R.framework/Versions/2.4/ 
Resources/library/SparseM/libs/i386/SparseM.so
   Reason: image not found
In addition: Warning messages:
1: package 'quantreg' was built under R version 2.5.0
2: package 'SparseM' was built under R version 2.5.0

any ideas?  I assumed at first that sparseM was required for quantreg  
but neither will load.

Regards

Steve Hodgkinson