The Virtual Null Modem has been modified to version 2.0.5 build 27. We've added various null-modem schematics that you can select for your virtual null-modem device and fixed two important bugs that didn't allow to work a virtual null modem propertly with .Net applications.
The new version of the software you can download in the Download area < http://www.virtual-null-modem.com/download/?vnullmod >.