problems with pg_restore and java

Hello

I have a program in java to make a backup running pg_restore, If you use
linux give a successful outcome.
but if you use windows I mark an error generating the socket. I think that
it could be the environment variables in Windows.
My java code is as follows.

String comando="";
String env[]={ "PGPASSWORD="+String.valueOf( jPPass.getPassword() ) };
comando=directorioBinario+" -h "+jTxIP.getText()+" -d
"+jTxNombreTabla.getText()+" -U "+jTxNombreUsuario.getText()+" -v -1
"+archivoRespaldo;

try {
*p = Runtime.getRuntime().exec(comando,env);* <-------Error in windows
InputStream es = p.getErrorStream();
arch.muestraSalidaDeError(es);
} catch (IOException ex) {
Logger.getLogger(gPrincipal.class.getName()).log(Level.SEVERE, null,
ex);
}

I use my env variable to enter the password of postgres

--
ISC Miguel Angel Hernandez Moreno