Not able to select Adapter engine with adapter configuration

Hello,

We've just installed new XI system (PI 7.0 SP7).

When we want to configure an comm. channel adapter running on the central adapter (eg. RFC_adapter)engine. In the dropdown bo for the Adapter Engine No entry is available for selection.

When looking in adapter monitoring Adapter engine status is okay.

Anybody a clue what is missing.

Thanks,

Emile