[BioC] biomart scripting help

[marco fabbri]

I looking for help on biomRt.
I am starting from a human affy code list and I would like to have the
mouse homologue.
If I am running this script I do not know which probe is homologue to

>homolog = getHomolog( id = c("1939_at","2000_at"), to.array =
"affy_mouse430_2              ", from.array ="affy_hg_u95av2",
from.mart = human, to.mart = mouse )

>show(homolog)
            V1
1 1427739_a_at
2 1426538_a_at
3   1428830_at
4   1421205_at

I also tried with getBM but no success..
My ideal result would be: from a humann affy id list to get a table like that:

human_probesets -- human_gene_name -- homol_mouse_probesets --
homolog_mouse_gene_name

Thank Marco