UnknownHostexception using apache commons

I am currently working with apache commons in my Project to gain access to my FTP Serv开发者_开发技巧er. Uploading a file is no problem at all, but If I want to download a file, I get an UnknownHost Exception what is strange because it is the same ftp server.

client.connect("ftp.liamissimo.li.ohost.de",21);
client.login("XXX", "XXX");
client.enterLocalPassiveMode();

This code works like this for uploading, but if I use it to download I got an UnknownHost exception.

I had a problem like this and I got it to work by using the IP of the hostname instead of the actual hostname...

check permissions in manifest file.

uses-permission android:name="android.permission.INTERNET"/>