i tried to download a File with ASIHTPP. I tried on my jailbroken Ipad and see that the Code download a File but no in the Documet Folder. So what is wrong? In Xcode is not a Error only a Warning that the documtensdirectory a unused variable is.
 - (IBAction)grabURLInBackground:(id)sender
{
   NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
   NSString *documentsDirectory = [paths objectAtIndex:0];
   NSURL *url = [NSURL URLWithString:@" http://db.tt/5WP2pia"];
   ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:url];
   [request setDownloadDestinationPath:@"/var/root/osk.rar"] 
   [request setDelegate:self];
   [request startAsynchronous];
}