SoftModem, winXP, vmware and QNX v4: how to make it accept t

I’ve got Fujitsu/Siemens Lifebook B-2175 notebook, it’s equipped with AMR’s softmodem emulating the COM3 port.
When I add COMM3 device to the virtual machine of QNX v4.25G and try calling in - nothing happens. All the ppp|modem|tinit settings are from my working dial-up server…

Is it possible to make it work in such an environment?