I am also having a problem with SBBS but with the DPMI 3.09 version. SBBS is accepting the telnet session and passing it through to the BBS front end, you can then navigate to the Door menu and execute TW2002 and it will run and everything is fine. When another user tries to connect in however it doesnt pass the correct node and handle information, it still thinks that the new users are the original user that logged in. My configuration is as follows:

In TW:
Set to twnode=1 in the Autoexec.bat
in TEDIT Node 1= Running off Door.sys and Fossil Port 1

In SBBS
The fossil drivers are done using NETFOSS so the execute statement in SBBS is:

D:\sbbs\nf.bat /n%# /h%h tw2002.exe twnode=%#

the statement is nf.bat is
@echo off
D:\sbbs\netfoss.com %1
if errorlevel 1 goto end
D:\sbbs\netcom.exe %1 %2 %3 %4 %5 %6 %7 %8 %9
D:\sbbs\netfoss.com /u
:end

Help!