we have bought 2851 router with CCME already installed on it, Unity Express was delivered on CD, we also have unity express netowrk module, router s recognizing this device, but I have problem with configuring it.
I don't know, probaly it is a stupid question, but do I have to install some unity exprss software on flash to run it?
CUE has it's own internal storage. You need to configure the CME router with basic connectivity (service-engine, routing, etc.) then you can session into the CUE. From there the CUE is upgraded with the correct configuration via FTP and TFTP. Here are some documents explaing the installation and upgrade process.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.