Hi, I just installed 3CX v9 RC2 on Server 2008 R2 (with .Net 3.51 SP1, IIS & Windows Experience). Anything else I missed ? I configured an extension for testing and then had the system email me the link to install the 3CX Assistant and 3CX Phone. On the Win7 x64 workstation, I clicked the email link and IE opens and pops up a window to install the 3CX Assistant, but it stops immediately with; An error occurred : Positive number required. Parameter name: bufferSize I have no idea what this means or how to fix it. If I download the Assistant directly from the Web management interface on the same Win7 workstation, it installs and works without any issue. I'm testing 3cx in hopes to convince my company to switch to it from Asterisk. Thanks for any help you can offer.