SQL & PL/SQL :: UTL_TCP Returning Blank Line?

I am trying to use utl_tcp to connect, through TCP/IP, to a 3rd party program PC Miler. When I use telnet, PC Miler works without any issue. However, when I use utl_tcp, beginning from the second PC Miler API call, when I do a utl_tcp.get_line to get the result, the first line that return is always blank (with 1 white space). Here is my program.

---------------------------------------------------
DECLARE
c utl_tcp.connection;
ret_val PLS_INTEGER;
v_data VARCHAR2(4000);
BEGIN
c := utl_tcp.open_connection('mars', 8145);

[code]....

Note that the 1st and 3rd API call is the same and should give me the same results. The 2nd API is supposed to give me 1 line back. At the end of each output, the server will end will the word "Ready". I use that to indicate when to exit the loop.

If I disconnect and reconnect after each API call, each output result will be correct because each API call will become the "1st" call since connection - like this program:

DECLARE
c utl_tcp.connection;
ret_val PLS_INTEGER;
v_data VARCHAR2(4000);
BEGIN
c := utl_tcp.open_connection('mars', 8145);

[code]....

If there is something wrong with PC Miler, why would it work when I telnet through a Windows Command prompt? If it is not PC Miler and utl_tcp, what else can be wrong?