[R-SIG-Mac] rgdal : load failure :-(

[massimosisasha]

hi. i've installed rgdal on R-2.2   on a osx10.4.6
but when itry to load the package i've this error message :


 > library(rgdal)
Errore in dyn.load(x, as.logical(local), as.logical(now)) :
	impossibile caricare libreria condivisa '/Library/Frameworks/ 
R.framework/Resources/library/rgdal/libs/rgdal.so':
   dlopen(/Library/Frameworks/R.framework/Resources/library/rgdal/ 
libs/rgdal.so, 6): Library not loaded: /usr/local/lib/libgdal.1.dylib
   Referenced from: /Library/Frameworks/R.framework/Resources/library/ 
rgdal/libs/rgdal.so
   Reason: image not found
Errore in library(rgdal) : .First.lib fallita per 'rgdal'
Errore in Sys.putenv(PROJ_LIB = .rgdal_old.PROJ_LIB) :
	oggetto ".rgdal_old.PROJ_LIB" non trovato

can you helme please?
Thanks a lot !
Massimo.