SQL Server remote connection to 2nd instance impossible

After installation of another SQL Server 2014 instance to a server where a default instance of SQL Server 2008 R2 is present, I cannot remote connect remote to the new named instance.

The default 2008 R2 instance uses TCP port 1433 set for all "IP(n)" settings.

Here is what I read / checked / tried:

Following this question: configure remote connection for multiple instances sql server 2008

I figured several settings and tried the following:

• Server Security: Mixed
• Server Connections Properties: Allow [checked]
• SQL Server Browser started
• Protocol Settings for the 2014 instance set as follows:
  • Shared Memory=Enabled,
  • Named Pipes=Disabled,
  • TCP/IP=Enabled
    • TCP IP Setting of new instance:
      • Enabled=Yes,
      • Listen All=YES,
    • TCP/IP Settings for IP(n):
      • Dynamic Ports=erased
      • TCP Port=erased
    • IPAll Setting:
      • Dynamic Ports = erased
      • Port=49172

I tried to remote connect using [IP]:49172\Instance and HostName:49172\Instance and HostName\Instance and [IP]\Instance without success.

I try to use SQL Server authentication, the user is available and is sysadmin and can connect local.

What am I missing here?