No schedulers responded

I have a big problem. Every time when BOINC connects to project it has this message:

--- - 2004-09-16 19:41:48 - Insufficient work; requesting more
SETI@home - 2004-09-16 19:41:48 - Requesting 44313 seconds of work
SETI@home - 2004-09-16 19:41:48 - Sending request to scheduler: http://setiboinc.ssl.berkeley.edu/sah_cgi/cgi
SETI@home - 2004-09-16 19:41:56 - Scheduler RPC to http://setiboinc.ssl.berkeley.edu/sah_cgi/cgi failed
SETI@home - 2004-09-16 19:41:56 - No schedulers responded
SETI@home - 2004-09-16 19:41:56 - Deferring communication with project for 18 minutes and 3 seconds

But when I disconnected from all projects except S@H then BOINC received a successfull reply from S@H server.

Server scheduler's status is Running.


I have BOINC CC 4.07
Projects: SAH 4.03, CPDN, LHC and PAH.
WinXP SP1 Professional
Intel P4 2.6 GHz, 512 Mb RAM

I have dialup connection with Internet.

Can anybody help me?
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Another addition information about the problem posted above.

When I do fresh BOINC install into new folder and then I attach only SAH project, BOINC CC connects with SAH scheduler successfully and gets new WUs for crunching.

When I detach all other projects (CPDN, P@H, LHC), BOINC also connects successfully with SAH scheduler.

But with all these projects BOINC has "No schedulers responded" message from SAH project server.

I think this happens because BOINC cant wait reply from SAH server because of small timeout.

Ping to SAH scheduler returns greater then 1200 msec. I have a slow dialup conn.

BOINC dev team, can you increase timeout period for replies from project scheduler servers in the next versions of BOINC Core Client?

Thanks for all possible help and sorry for my terrible english.

I still have these messages :(
...
SETI@home - 2004-10-21 19:30:06 - Sending request to scheduler: http://setiboinc.ssl.berkeley.edu/sah_cgi/cgi
SETI@home - 2004-10-21 19:30:14 - Scheduler RPC to http://setiboinc.ssl.berkeley.edu/sah_cgi/cgi failed
SETI@home - 2004-10-21 19:30:14 - No schedulers responded
SETI@home - 2004-10-21 19:30:14 - Deferring communication with project for 56 minutes and 35 seconds
...

I have 4 finished WUs which ready to report with closest deadline 2004/10/26.