Problem looks a bit like some mentioned in this forum: i completed my first CP WU, but it will not upload the .zip files.

2004-11-16 14:21:06 [climateprediction.net] Started upload of 30en_000161911_1_2.zip
2004-11-16 14:21:09 [climateprediction.net] Temporarily failed upload of 30en_000161911_1_2.zip
2004-11-16 14:21:09 [climateprediction.net] Backing off 3 hours, 22 minutes, and 30 seconds on transfer of file 30en_000161911_1_2.zip

How can I solve this?

Wait patiently. The data server at Bern Uni, (Switzerland), is down for maintenance. And has been for several days.

Unfortunately, it looks like this is a polite way of saying: "We're repainting the computer room, and can't decide on a colour".

There are a lot of threads in the Windows part of the Boinc forum if you want something to read while you wait.

Les