installing Rmpi on centos 6 with mpich

Hello everyone

im trying to install Rmpi library on centos 6. I have already installed
mpich2 1.4

[root at localhost ~]# R --version

R version 2.15.1 (2012-06-22) -- "Roasted Marshmallows"
Copyright (C) 2012 The R Foundation for Statistical Computing
ISBN 3-900051-07-0
Platform: x86_64-redhat-linux-gnu (64-bit)

[root at localhost ~]# mpich2version

MPICH2 Version:     1.4.1p1
MPICH2 Release date: Thu Sep  1 13:53:02 CDT 2011
MPICH2 Device:     ch3:nemesis
MPICH2 configure:
MPICH2 CC: gcc    -O2
MPICH2 CXX: c++   -O2
MPICH2 F77: gfortran   -O2
MPICH2 FC: f95   -O2

when i issue the install order i get this output:

install.packages("Rmpi")
Installing package(s) into ?/usr/lib64/R/library?
(as ?lib? is unspecified)
trying URL 'http://cran.rstudio.com/src/contrib/Rmpi_0.6-1.tar.gz'
Content type 'application/x-gzip' length 92977 bytes (90 Kb)
opened URL
==================================================
downloaded 90 Kb
* installing *source* package ?Rmpi? ...
** package ?Rmpi? successfully unpacked and MD5 sums checked
checking for gcc... gcc -m64 -std=gnu99
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables...
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc -m64 -std=gnu99 accepts -g... yes
checking for gcc -m64 -std=gnu99 option to accept ISO C89... none needed
I am here /usr/local and it is OpenMPI
Trying to find mpi.h ...
Found in /usr/local/include
Trying to find libmpi.so or libmpich.a ...
checking for main in -lmpi... no
libmpi not found. exiting...
ERROR: configuration failed for package ?Rmpi?
* removing ?/usr/lib64/R/library/Rmpi?
The downloaded source packages are in
?/tmp/RtmpBvTTqc/downloaded_packages?
Updating HTML index of packages in '.Library'
Making packages.html  ... done
Warning message:
In install.packages("Rmpi") :
 installation of package ?Rmpi? had non-zero exit status

I have tried with different configure.args but the result is the same, i
cant seem to install it...

Is there someone who has been through the same problem? or that knows a
guide i can follow or something?

Thanks in advance

Ricardo