the connection has been lost trying to reconnect

[mia]

...Have been using TeamViewer for some time and it has worked well. "Client" and "host" are both Win7 and both on the same LAN. The "host" is wired to the lan and the "client" is wirelessly connected. Today, when connecting to the host from client, connection established fine, but then randomly failed, yielding the error message above on client. The longest I have stayed connected is a few minutes; the shortest, a few seconds.

Rebooted both machines and updated TeamViewer on Client. Already newest version on Host.

Thanks for your ideas!