I have a java application which reads a file from a website address:

    URL vers = new URL("mysiteurl"+"/file.txt");
    URLConnection conn = vers.openConnection();
    conn.setDoInput(true);
    conn.setUseCaches(false);
    DataInputStream in = new DataInputStream(conn.getInputStream() );
    String value= in.readUTF();

This works fine  on windows XP,  and fine on Windows Vista if the
application is installed (using Install4j) from a Vista administrator
account.

But if installed from Vista  standard account i always get an exception from
the above:

java.net.ConnectException: Connection refused: connect.

Ive tried this with the different Vista execution levels and get the same
exception.
Reading a html file I get the Exception: Connection refused: connect.

Is there some reason why a java application  cant read a file from the
internet on a Vista standard account?