Probably beginner's problem

Helly everybody,

I am a RSAGA-beginner and I am trying to use some simple modules. Although I
have combed through this forum for an answer to my questions, I could not
make my modules run. So I post my two problems and I am hoping for some
help.

1.	I am trying to add 10 *.sgrd with rsaga.grid.calculus:

setwd("C:/Users/Ludwig Hilger/Documents/Studium/SS 2010/SEDAG - HIWI/Daten
und Modul/Zwieselbachtal/")
#rsaga.get.modules("grid_calculus")                        #Infos ?ber ein
eine Modulbibliothek
#rsaga.get.usage("grid_calculus", 1)                       #Infos ?ber die
Parameter des Moduls
rsaga.grid.calculus(in.grids = c("ZBT_mure1_modvel", "ZBT_mure2_modvel",
"ZBT_mure3_modvel", "ZBT_mure4_modvel", "ZBT_mure5_modvel",
"ZBT_mure6_modvel", "ZBT_mure7_modvel", "ZBT_mure8_modvel",
"ZBT_mure9_modvel", "ZBT_mure10_modvel"), 
out.grid = '"ZBT_muren1_10_modvel2"', formula = "a+b+c+d+e+f+g+h+i", silent
= FALSE)

I get back:

Unknown option 'INPUT'
Usage: 1 -GRIDS <str> -RESULT <str> [-FORMULA <str>]
  -GRIDS:<str>          Grids
        Grid list (input)
  -RESULT:<str>         Result
        Grid (output)
  -FORMULA:<str>        Formula
        Text

error: executing module [Grid Calculator]

I have tried solving it by using rsaga.geoprocessor, using double quotation
marks for the file specifications, the alternative for formula specification
(~), but still it does not work.

2.	I am trying to use ?Shapes to grid?. I am wondering where to specify the
target grid dimensions if you choose Target to be 1:

rsaga.geoprocessor(lib="grid_gridding", silent = FALSE, module = 0, 
param=list(
GRID_GRID='"C:/Users/Ludwig Hilger/Documents/Studium/SS 2010/SEDAG -
HIWI/Daten und Modul/Zwieselbachtal/In R berechnete
Grids/ZBT_dreiteilige_auswahl.buff.sgrd"', 
INPUT='"ZBT_dreiteilige_auswahl_buff.shp"', 
FIELD=8,
GRID_TYPE=0,
LINE_TYPE=1,
TARGET=1
))

I get back:

Load shapes: ZBT_dreiteilige_auswahl_buff.shp...
ready

Parameters

Shapes: ZBT_dreiteilige_auswahl_buff
Attribute: CAT
Method for Lines: thick
Preferred Target Grid Type: Integer (1 byte)
Target Grid: grid

error: executing module [Shapes to Grid]

Thank you,

Ludwig / Eichst?tt, Germany