Opening connection doc lasts ever - and Ctrl-Interrupt shows the document

In my installation, if I administer a WAN connected Server and try to open the connection doc for my LAN server, this lasts more or less for ever.

If I break the request, which Admin is loading the doc, it is shown immediately.

Using a TCP/IP sniffer, I found that some Lotus Script is transfered from Server to Admin and from Admin back to server.

But why th last? If I open a doc, I would expect to READ documents, not sent them…

Moreover: Why does loading of a doc never stopps?