problem with "Another instance of BOINC is running"

Hi,

I'm trying to run the BOINC client (5.10.21 i686-pc-linux-gnu)
on a
linux 2.6.18-5-686 system with a
Intel(R) Xeon(TM) CPU 2.40GHz
but am getting the above error.

I've checked that no other BOINC process is running
(ps auxwww | grep boinc).

I've checked that there is no lockfile before running the client.

I've checked with netstat -ltnp & netstat -tnp that ports 1043 and 31416 are not in use by others.

Below is the partial strace output.

Any suggestions?

Thanks in advance.

stat64("time_stats_log", {st_mode=S_IFREG|0664, st_size=0, ...}) = 0
open("time_stats_log", O_WRONLY|O_APPEND|O_CREAT|O_LARGEFILE, 0666) = 3
fstat64(3, {st_mode=S_IFREG|0664, st_size=0, ...}) = 0
mmap2(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7fd2000
fstat64(3, {st_mode=S_IFREG|0664, st_size=0, ...}) = 0
_llseek(3, 0, [0], SEEK_SET) = 0
munmap(0xb7fd2000, 8192) = 0
gettimeofday({1200916887, 656619}, NULL) = 0
stat64("cc_config.xml", 0xbff14dc0) = -1 ENOENT (No such file or directory)
rt_sigaction(SIGILL, NULL, {SIG_DFL}, 8) = 0
rt_sigaction(SIGILL, {0x808df18, [], 0}, NULL, 8) = 0
rt_sigaction(SIGABRT, NULL, {SIG_DFL}, 8) = 0
rt_sigaction(SIGABRT, {0x808df18, [], 0}, NULL, 8) = 0
rt_sigaction(SIGBUS, NULL, {SIG_DFL}, 8) = 0
rt_sigaction(SIGBUS, {0x808df18, [], 0}, NULL, 8) = 0
rt_sigaction(SIGSEGV, NULL, {SIG_DFL}, 8) = 0
rt_sigaction(SIGSEGV, {0x808df18, [], 0}, NULL, 8) = 0
rt_sigaction(SIGSYS, NULL, {SIG_DFL}, 8) = 0
rt_sigaction(SIGSYS, {0x808df18, [], 0}, NULL, 8) = 0
rt_sigaction(SIGPIPE, NULL, {SIG_DFL}, 8) = 0
rt_sigaction(SIGPIPE, {0x808df18, [], 0}, NULL, 8) = 0
rt_sigaction(SIGHUP, NULL, {SIG_DFL}, 8) = 0
rt_sigaction(SIGHUP, {0x8080a04, [], 0}, NULL, 8) = 0
rt_sigaction(SIGINT, NULL, {SIG_DFL}, 8) = 0
rt_sigaction(SIGINT, {0x8080a04, [], 0}, NULL, 8) = 0
rt_sigaction(SIGQUIT, NULL, {SIG_DFL}, 8) = 0
rt_sigaction(SIGQUIT, {0x8080a04, [], 0}, NULL, 8) = 0
rt_sigaction(SIGTERM, NULL, {SIG_DFL}, 8) = 0
rt_sigaction(SIGTERM, {0x8080a04, [], 0}, NULL, 8) = 0
rt_sigaction(SIGPWR, NULL, {SIG_DFL}, 8) = 0
rt_sigaction(SIGPWR, {0x8080a04, [], 0}, NULL, 8) = 0
gettimeofday({1200916887, 658116}, NULL) = 0
open("./lockfile", O_WRONLY|O_CREAT|O_LARGEFILE, 0644) = 4
fcntl64(4, F_SETLK64, {type=F_WRLCK, whence=SEEK_SET, start=0, len=0}, 0xbff149f0) = -1 EIO (Input/output error)
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigaction(SIGCHLD, NULL, {SIG_DFL}, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
nanosleep({1, 0}, {1, 0}) = 0
gettimeofday({1200916948, 687766}, NULL) = 0
write(2, "Another instance of BOINC is run"..., 37Another instance of BOINC is running
) = 37
close(4) = 0
futex(0x81e36cc, FUTEX_WAKE, 2147483647) = 0
exit_group(-148) = ?
Process 18323 detached