problem I think
 

[17:53:03] - Writing 911656 bytes of core data to disk...
[17:53:03] ... Done.
[17:53:03] - Shutting down core
[17:53:03]
[17:53:03] Folding@home Core Shutdown: FINISHED_UNIT
[17:53:06] CoreStatus = 64 (100)
[17:53:06] Sending work to server


[17:53:06] + Attempting to send results
[17:53:08] Couldn't send HTTP request to server (wininet)
[17:53:08] + Could not connect to Work Server (results)
[17:53:08] (171.64.122.144:8080)
[17:53:08] - Error: Could not transmit unit 04 (completed May 16). Keeping unit in queue.


[17:53:08] + Attempting to send results
[17:53:10] Couldn't send HTTP request to server (wininet)
[17:53:10] + Could not connect to Work Server (results)
[17:53:10] (171.64.122.144:8080)
[17:53:10] - Error: Could not transmit unit 04 (completed May 16). Keeping unit in queue.
[17:53:10] - Preparing to get new work unit...
[17:53:10] + Attempting to get work packet
[17:53:10] - Connecting to assignment server
[17:53:11] - Successful: assigned to (171.64.122.119).
[17:53:11] + News From Folding@Home: Welcome to Folding@Home
[17:53:11] Loaded queue successfully.


[17:53:12] + Attempting to send results
[17:53:14] Couldn't send HTTP request to server (wininet)
[17:53:14] + Could not connect to Work Server (results)
[17:53:14] (171.64.122.144:8080)
[17:53:14] - Error: Could not transmit unit 04 (completed May 16). Keeping unit in queue.
[17:53:14] + Closed connections
[17:53:14]
[17:53:14] + Processing work unit
[17:53:14] Core required: FahCore_65.exe
[17:53:14] Core not found.
[17:53:14] - Core is not present or corrupted.
[17:53:14] - Attempting to download new core...
[17:53:14] + Downloading new core: FahCore_65.exe

it's all fine

you can't submit your completed score, that's common. wait a bit, it'll be uploaded later

[17:53:14] - Attempting to download new core...
[17:53:14] + Downloading new core: FahCore_65.exe

it's downloading a new WU to work on

yes, I know, but I tought it was maybe my proxy, because this night my proxy also failed, I sended my WU but I didn't received a new one. And I could'nt also go on the internet :).

Always, when I've used kazaa I got such problems :D

But if it will be sended later it's ok.

It will be send with my next WU, am I right?

yep, but watch out the WU doesn't expire