SBS 2011 new fax problems after modem replacement

Hello! I have an SBS 2011 server that uses SBS Fax service to route faxes in and out, delivering inbound to an email user. Worked like a champ for years, and then the ZOOM USB modem that was doing this job died and was replaced with a USB USR 5637. I have removed the drivers from the previous fax modem and installed the drivers for the new unit, and was able to run the fax configuration wizard from the SBS console and two problems occur. The first is the option for "route through email" is grayed out and not selectable. I opted to select store in a folder instead to complete the wizard successfully, and it errors out on Configuring US Robotics v.92.  Manually attempting to start the fax service results in a message that is does start successfully, but immediately stops, and the app log provides these errors 32108 and 1000 (below).  I have also removed and reinstalled the SBS fax service on the server with the same results.  Any thoughts on how to get this service functioning again as soon as possible?  TIA!

Log Name:      Application
Source:        Microsoft Fax
Date:          8/26/2018 9:46:02 AM
Event ID:      32108
Task Category: Unknown
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      NRV2012.domain.local
Description:
The Fax Service encountered a problem and needed to close.
 Error Code: 0x00000000
 This error code indicates the cause of the error.
 A Windows Error Report was generated with full details about the problem.
 The Fax service will restart now.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="Microsoft Fax" />
    <EventID Qualifiers="49152">32108</EventID>
    <Level>2</Level>
    <Task>4</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2018-08-26T14:46:02.000000000Z" />
    <EventRecordID>5491462</EventRecordID>
    <Channel>Application</Channel>
    <Computer>NRV2012.domain.local</Computer>
    <Security />
  </System>
  <EventData>
    <Data>0x00000000</Data>
  </EventData>
</Event>


Log Name:      Application
Source:        Application Error
Date:          8/26/2018 9:46:22 AM
Event ID:      1000
Task Category: (100)
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      NRV2012.domain.local
Description:
Faulting application name: fxssvc.exe, version: 6.1.7601.17514, time stamp: 0x4ce7b339
Faulting module name: FXSTIFF.dll, version: 6.1.7601.17514, time stamp: 0x4ce7c672
Exception code: 0xc0000005
Fault offset: 0x000000000005c462
Faulting process id: 0x39ec
Faulting application start time: 0x01d43d4b81e448af
Faulting application path: C:\Windows\system32\fxssvc.exe
Faulting module path: C:\Windows\system32\FXSTIFF.dll
Report Id: cc2bfc8a-a93e-11e8-a7fc-000c299d06ec
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="Application Error" />
    <EventID Qualifiers="0">1000</EventID>
    <Level>2</Level>
    <Task>100</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2018-08-26T14:46:22.000000000Z" />
    <EventRecordID>5491463</EventRecordID>
    <Channel>Application</Channel>
    <Computer>NRV2012.domain.local</Computer>
    <Security />
  </System>
  <EventData>
    <Data>fxssvc.exe</Data>
    <Data>6.1.7601.17514</Data>
    <Data>4ce7b339</Data>
    <Data>FXSTIFF.dll</Data>
    <Data>6.1.7601.17514</Data>
    <Data>4ce7c672</Data>
    <Data>c0000005</Data>
    <Data>000000000005c462</Data>
    <Data>39ec</Data>
    <Data>01d43d4b81e448af</Data>
    <Data>C:\Windows\system32\fxssvc.exe</Data>
    <Data>C:\Windows\system32\FXSTIFF.dll</Data>
    <Data>cc2bfc8a-a93e-11e8-a7fc-000c299d06ec</Data>
  </EventData>
</Event>