error: unable to load installed packages just now

When I tried to run the R console in Eclipse, I got this error: ``` ....Please make sure that R package 'rj' (1.1 or compatible) is installed... ``` So I tried to install it in the R console like this: ``` install.packages(c("rj", "rj.gd"), repos="http://download.walware.de/rj-1.1") ``` and got this error: ``` ** testing if installed package can be loaded Error : .onLoad failed in loadNamespace() for 'rj.gd', details: call: dyn.load(file, DLLpath = DLLpath, ...) error: unable to load shared object '/home/alex/R/x86_64-pc-linux-gnu-library/2.15/rj.gd/libs/rj.gd.so': libjvm.so: cannot open shared object file: No such file or directory Error: loading failed Execution halted ERROR: loading failed ``` and I found that when installing rJava using: `install.packages("rJava")` gets a similar error: ``` ** testing if installed package can be loaded Error : .onLoad failed in loadNamespace() for 'rJava', details: call: dyn.load(file, DLLpath = DLLpath, ...) error: unable to load shared object '/home/alex/R/x86_64-pc-linux-gnu-library/2.15/rJava/libs/rJava.so': libjvm.so: cannot open shared object file: No such file or directory Error: loading failed Execution halted ERROR: loading failed ``` When I run `sudo R CMD javareconf`,I got this output: ``` Java interpreter : /usr/bin/java Java version : 1.7.0 Java home path : /usr/lib/jvm/java-7-oracle/jre Java compiler : /usr/bin/javac Java headers gen.: /usr/bin/javah Java archive tool: /usr/bin/jar NOTE: Your JVM has a bogus java.library.path system property! Trying a heuristic via sun.boot.library.path to find jvm library... Java library path: $(JAVA_HOME)/lib/amd64:$(JAVA_HOME)/lib/amd64/server JNI linker flags : -L$(JAVA_HOME)/lib/amd64 -L$(JAVA_HOME)/lib/amd64/server -ljvm JNI cpp flags : -I$(JAVA_HOME)/../include -I$(JAVA_HOME)/../include/linux Updating Java configuration in /etc/R Done. ``` by the way,my configuration is: ``` Ubuntu 11.10 64bit Eclipse 3.7 Oracle-1.7-jdk R version 2.15.1 ```