[R-SIG-Mac] problem installing lme4 package with R 2.9.0

[Robert Seyfarth]

When attempting to install the lme4 package I get the following error 
message:

> Error in dyn.load(file, DLLpath = DLLpath, ...) :
>   unable to load shared library 
> '/Library/Frameworks/R.framework/Versions/2.9/Resources/library/lme4/libs/i386/lme4.so':
>   
> dlopen(/Library/Frameworks/R.framework/Versions/2.9/Resources/library/lme4/libs/i386/lme4.so, 
> 6): Library not loaded: /usr/local/lib/libgfortran.2.dylib
>   Referenced from: 
> /Library/Frameworks/R.framework/Versions/2.9/Resources/library/lme4/libs/i386/lme4.so
>   Reason: image not found
> Error: package/namespace load failed for 'lme4'
But when I look in the library folder lme4.so is there.

Thanks for any help...