I have a problem to connect the server of worldcommunitygrid from boinc.
Boinc gives me the following message:

3/06/08 17:09:44||Starting BOINC client version 5.10.45 for windows_intelx86
3/06/08 17:09:44||log flags: task, file_xfer, sched_ops
3/06/08 17:09:44||Libraries: libcurl/7.18.0 OpenSSL/0.9.8e zlib/1.2.3
3/06/08 17:09:44||Data directory: C:\ARCHIVOS\BOINC
3/06/08 17:09:44||Processor: 2 GenuineIntel Intel(R) Core(TM)2 CPU 4300 @ 1.80GHz [x86 Family 6 Model 15 Stepping 2]
3/06/08 17:09:44||Processor features: fpu tsc sse sse2 mmx
3/06/08 17:09:44||OS: Microsoft Windows XP: Professional Edition, Service Pack 2, (05.01.2600.00)
3/06/08 17:09:44||Memory: 1015.23 MB physical, 2.38 GB virtual
3/06/08 17:09:44||Disk: 74.53 GB total, 57.21 GB free
3/06/08 17:09:44||Local time is UTC +2 hours
3/06/08 17:09:45|http://www.worldcommunitygrid.org/|URL: http://www.worldcommunitygrid.org/; Computer ID: not assigned yet; location: (none); project prefs: default
3/06/08 17:09:45||General prefs: from http://www.worldcommunitygrid.org/ (last modified 29-May-2008 13:02:52)
3/06/08 17:09:45||Host location: none
3/06/08 17:09:45||General prefs: using your defaults
3/06/08 17:09:45||Reading preferences override file
3/06/08 17:09:45||Preferences limit memory usage when active to 507.62MB
3/06/08 17:09:45||Preferences limit memory usage when idle to 710.66MB
3/06/08 17:09:45||Preferences limit disk usage to 1.86GB
3/06/08 17:40:00|http://www.worldcommunitygrid.org/|Sending scheduler request: Requested by user. Requesting 0 seconds of work, reporting 0 completed tasks
3/06/08 17:40:02||Project communication failed: attempting access to reference site
3/06/08 17:40:04||Access to reference site succeeded - project servers may be temporarily down.
3/06/08 17:40:06|http://www.worldcommunitygrid.org/|Scheduler request failed: Failure when receiving data from the peer


Boinc connects me correctly to other programs, so the proxy server should not be.
Can someone help me?
Thank you.