my code is follow:

> library(xcms)
Loading required package: mzR
Loading required package: Rcpp
Error : .onLoad failed in loadNamespace() for 'mzR', details:
  call: value[[3L]](cond)
  error: failed to load module Ramp from package mzR
invalid assignment for reference class field ‘class_pointer’, should be from class “externalptr” or a subclass (was class “character”)
In addition: Warning messages:
1: package ‘Rcpp’ was built under R version 3.0.3 
2: In fun(libname, pkgname) :
   mzR has been built against a different Rcpp version
 than is installed on your system. This might lead to errors
 when loading mzR. If you encounter such issues, please send
 a report, including the output of sessionInfo() to the Bioc
 mailing list -- http://www.bioconductor.org/help/mailing-list.
Error: package ‘mzR’ could not be loaded

What's wrong with during the packing?