Serial IO

Hi. Im trying to connect my modem and make it ring a
number using a program and sending the serial IO the next
strings:

ATE0V1H ... Initialize modem
AT &F &C1 &D2 &Q5 &K0 S46=0 ... Initialize modem
ATDT[Number] ... Dial number
AT Z H0 ... Hang up

well, they seem to be correct but I cant just make the
modem to work and ring such number... I dont know if it is
because Im not giving the irq number and the port (for ex.
3e8, 2f8)... of course in that program Im telling it the
correct COM port but anything else... as the program says
it should work that way but nothing happens
and also I cant specify the irq number and the port...

how can I make the modem to start and ring a number in a
very easy way?... I hear a sound at the modem when I start
that procedure but it doesnt ring the number!

thanks for your time & support in advance,
Javier.