[R] convert excell file to text with RODBC package

[solares@unsl.edu.ar]

Hi, i can convert excell to list in R with package RODBC ()but i don't
understand 2 mistake
1) Don't read the last row of the table excell
2) Don' t take the hours

My excell file call prueba4.xls and have the following rows:
where prueba4.xls was make in excell (office xp) and have one spreadsheet
call "Hoja1", you see each rows of she:
Día	Hora	col1	col2	col3	col4	col5	col6	col7	col8
15/12/2003	12:14:59	217	2760	8,2	35	79,6	86,4
15/12/2003	12:15:00	217	2764	8,2	35	79,6	86,4
15/12/2003	12:15:01	217	2758	8,3	35	79,6	86,4
15/12/2003	12:15:02	217	2760	8,3	35	79,6	86,4
15/12/2003	12:15:03	217	2755	8,3	35	79,6	86,4
15/12/2003	12:15:04	217	2766	8,3	35	79,6	86,4
15/12/2003	12:15:05	217,1	2766	8,3	35,1	79,6	86,4
15/12/2003	12:15:06	217,1	2758	8,3	35,1	79,6	86,4
15/12/2003	12:15:07	217,1	2768	8,3	35,1	79,6	86,4

My code (i use the R 1.7.1 for windows xp) is the following:

 library(RODBC)
> canal<-odbcConnectExcel("c:/prueba4.xls")
> tablas<-sqlTables(canal)
> tablas
    TABLE_CAT TABLE_SCHEM TABLE_NAME   TABLE_TYPE REMARKS
1 c:\\prueba4        <NA>     Hoja1$ SYSTEM TABLE    <NA>
2 c:\\prueba4        <NA>     Hoja2$ SYSTEM TABLE    <NA>
3 c:\\prueba4        <NA>     Hoja3$ SYSTEM TABLE    <NA>
> tbl<-sqlFetch(canal,substr(tablas[1,3],1,nchar(tablas[1,3])-1))
> tbl[1]
                  Día
1 2003-12-15 00:00:00
2 2003-12-15 00:00:00
3 2003-12-15 00:00:00
4 2003-12-15 00:00:00
5 2003-12-15 00:00:00
6 2003-12-15 00:00:00
7 2003-12-15 00:00:00
8 2003-12-15 00:00:00
9 2003-12-15 00:00:00

¿Which is the mistake?.

And the second question is the command odbcFechRows() don't work,
for example if write
tbl<-odbcFetchRows(canal) in place of sqlFetch result a error
stat = -1 and the list is NULL
odbcGetErrMsg return No results available. Thank Ruben