Modem troubles

I’m having problems getting my Hayes Accura 336 modem to work. I did
the following to set the serial port correctly…

slay devc-ser8250

/sbin/devc-ser8250 -u1 3e8,4

I then ran qtalk -m /dev/ser1. I sent a few commands, so I could hear
that it was working (ata, atds, etc). Next, I proceeded to go to the
dialer program and set everything up accordingly. After I hit connect,
I got the following output…

Using /dev/ser1 (or similar)
ATZ
Connection failed.

I then searched for a modem init string and found one (AT&F), put it
in and tried again. Same thing happened. I have tried absolutely
everything I can think of and suggestions from others with no success.
Please help!!!

Danny