[galaxy-dev] Problem with tool in R

I have a problem with a tool in R. I can't load the RPostgreSQL library that I get the following error: ERROR: carregando pacotes exigidos: dbi My xml is this: <command interpreter="bash">r_wrapper.sh $script_file</command> <configfiles> <configfile name="script_file"> library(RPostgreSQL) ... </configfile> </configfiles> I have this library installed at my system, what can I do?