win1252 to UTF8

Hi all,

I need to convert my database from codification WIN1252 to UTF8,
I've try to use pg_dump -U postgres -h 192.168.0.192 -E UTF8 -v -F p -f
bkp.sql database
but I have to following erro:
pg_dump: SQL command failed
pg_dump: Error message from server: ERRO: caracter 0x8d da codificação
"WIN1252" não tem equivalente em "UTF8"
( translation: pg_dump: Error message from server: ERRO: caracter
0x8d of codification "WIN1252" don't have equivalent in "UTF8" )

also I tryed to run pg_dump converting to codification LATIN1 but
then I have the follow erro:
pg_dump: invalid client encoding "LATIN1" specified

may be I could bring a dump file in LATIN1 and then user iconve to
convert into UTF8 ... but I fail!

is there a good soul to help me out in this matter ??

Thanks a lot every one.