无法在R上加载rJava

我希望在R x64 3.1.2中加载rJava。操作系统-Windows 8.1 64位

虽然安装似乎可以正常工作：

  > install.packages("rJava")
    Installing package into ‘C:/Users/sony/Documents/R/win-library/3.1’
    (as ‘lib’ is unspecified)
    --- Please select a CRAN mirror for use in this session ---
    trying URL 'http://cran.utstat.utoronto.ca/bin/windows/contrib/3.1/rJava_0.9-6.zip'
    Content type 'application/zip' length 758898 bytes (741 Kb)
    opened URL
    downloaded 741 Kb

package ‘rJava’ successfully unpacked and MD5 sums checked

The downloaded binary packages are in
        C:\Users\sony\AppData\Local\Temp\RtmpamYUH7\downloaded_packages

加载程序包时出现错误：

library(rJava)
Error in get(Info[i, 1], envir = env) : 
  lazy-load database 'C:/Users/sony/Documents/R/win-library/3.1/rJava/R/rJava.rdb' is corrupt
In addition: Warning message:
In get(Info[i, 1], envir = env) : internal error -3 in R_decompress1
Error: package or namespace load failed for ‘rJava’

我知道我正在使用R-64位，同时将环境变量Path设置为：

C:\Program Files\Java\jdk1.7.0_51\bin;C:\Program Files\Java\jre7\bin\server;

同样，Java版本也是64位。我不明白该错误的原因。

通过R手动设置时：

options(java.home="C:\\Program Files\\Java\\jdk1.7.0_51\\bin")
library(rJava)

我收到此错误：

Error : .onLoad failed in loadNamespace() for 'rJava', details:
  call: inDL(x, as.logical(local), as.logical(now), ...)
  error: unable to load shared object 'C:/Users/sony/Documents/R/win-library/3.1/rJava/libs/x64/rJava.dll':
  LoadLibrary failure:  The specified module could not be found.

Error: package or namespace load failed for ‘rJava’

有什么建议吗？我卸载了某些旧版本的Java后，似乎出现了该错误。

其他：另外，我没有将JAVA_HOME设置为环境变量。

卸载并重新安装R似乎也不能解决问题。

删除较旧的Java版本也无济于事。