flexfax: USR Sportster 28.8 problems

[Osman Burchan Bayazit <burchanb@cs.tamu.edu>]

Hello,
 I have installed hylafax-v4.0pl2 to my Machintosh 6100/66 running
MkLinux Release 3. I have an external USR Sportster Vi 28.8 modem connected 
to the computer. The connection is ok, since I can connect to my ISP. 
However, when I tried to send a fax, the FaxSend program fails to
send the fax. The system logs show that the program complains about
"being unable to configure modem as fax". Before installing hylafax
I tried the instructions in the documents to check whether the modem  is  ok
for fax and it worked there. I checked the mailing archieve and saw that
there are lots of complains about USR modems but none of the answers solved
my problem. I tried the Class 1 and 2.0 modes as well as 19200 speed 
instead of 38400 found by faxsetup. I guess the USR modem configuration is
not working well (at least the initialization commands). Would some body
send me his/hers working configuration for external USR modems.
Thanks
burchan