can't compute : no disk space?

Hi, i have problem with accepting new work unit. I have error: YOU must free -0.0 MB before, but it's nonsenece I have about 9GB free space on disk, please help me. Thanks.

Sun 28 Aug 2011 09:30:06 CEST Starting BOINC client version 6.10.58 for x86_64-pc-linux-gnu
Sun 28 Aug 2011 09:30:06 CEST log flags: file_xfer, sched_ops, task
Sun 28 Aug 2011 09:30:06 CEST Libraries: libcurl/7.21.3 NSS/3.12.10.0 zlib/1.2.5 libidn/1.19 libssh2/1.2.7
Sun 28 Aug 2011 09:30:06 CEST Data directory: /var/lib/boinc
Sun 28 Aug 2011 09:30:06 CEST Processor: 2 GenuineIntel Intel(R) Core(TM)2 Duo CPU P8400 @ 2.26GHz [Family 6 Model 23 Stepping 6]
Sun 28 Aug 2011 09:30:06 CEST Processor: 3.00 MB cache
Sun 28 Aug 2011 09:30:06 CEST Processor features: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good nopl aperfmperf pni dtes64 monitor ds_cpl vmx smx est tm2
Sun 28 Aug 2011 09:30:06 CEST OS: Linux: 2.6.40-4.fc15.x86_64
Sun 28 Aug 2011 09:30:06 CEST Memory: 2.91 GB physical, 4.91 GB virtual
Sun 28 Aug 2011 09:30:06 CEST Disk: 49.22 GB total, 9.87 GB free
Sun 28 Aug 2011 09:30:06 CEST Local time is UTC +2 hours
Sun 28 Aug 2011 09:30:06 CEST No usable GPUs found
Sun 28 Aug 2011 09:30:06 CEST Einstein@Home URL http://einstein.phys.uwm.edu/; Computer ID 4174602; resource share 100
Sun 28 Aug 2011 09:30:07 CEST Einstein@Home General prefs: from Einstein@Home (last modified 20-Feb-2010 00:16:54)
Sun 28 Aug 2011 09:30:07 CEST Einstein@Home Host location: none
Sun 28 Aug 2011 09:30:07 CEST Einstein@Home General prefs: using your defaults
Sun 28 Aug 2011 09:30:07 CEST Reading preferences override file
Sun 28 Aug 2011 09:30:07 CEST Preferences:
Sun 28 Aug 2011 09:30:07 CEST max memory usage when active: 1490.17MB
Sun 28 Aug 2011 09:30:07 CEST max memory usage when idle: 2086.24MB
Sun 28 Aug 2011 09:30:07 CEST max disk usage: 0.00GB
Sun 28 Aug 2011 09:30:07 CEST don't use GPU while active
Sun 28 Aug 2011 09:30:07 CEST (to change preferences, visit the web site of an attached project, or select Preferences in the Manager)
Sun 28 Aug 2011 09:30:07 CEST Using proxy info from GUI
Sun 28 Aug 2011 09:30:07 CEST Not using a proxy
Mon 29 Aug 2011 07:28:18 CEST Einstein@Home Sending scheduler request: To fetch work.
Mon 29 Aug 2011 07:28:18 CEST Einstein@Home Requesting new tasks
Mon 29 Aug 2011 07:28:20 CEST Einstein@Home Scheduler request failed: Couldn't resolve host name
Mon 29 Aug 2011 07:28:48 CEST Project communication failed: attempting access to reference site
Mon 29 Aug 2011 07:28:52 CEST Internet access OK - project servers may be temporarily down.
Mon 29 Aug 2011 07:33:37 CEST Einstein@Home Sending scheduler request: To fetch work.
Mon 29 Aug 2011 07:33:37 CEST Einstein@Home Requesting new tasks
Mon 29 Aug 2011 07:33:40 CEST Einstein@Home Scheduler request completed: got 0 new tasks
Mon 29 Aug 2011 07:33:40 CEST Einstein@Home Message from server: No work sent
Mon 29 Aug 2011 07:33:40 CEST Einstein@Home Message from server: Gamma-ray pulsar search #1 needs 19.07MB more disk space. You currently have 0.00 MB available and it needs 19.07 MB.
Mon 29 Aug 2011 07:33:40 CEST Einstein@Home Message from server: No disk space (YOU must free -0.0 MB before BOINC gets space). Review preferences for minimum disk free space allowed.