i have can't a new thread errno12 error help me (1 reply)

my server properties is

6 cpu
4 gb ram
windows 2003
site hit 5k for a day.
i have an error for 4 days. error name is #1135 - Can't create a new thread (errno 12); and thread_connected value is very high (for example 150)

help me how fix this error.

my.ini

default-character-set=latin1
default-storage-engine=INNODB
read_buffer_size=4M
read_rnd_buffer_size=256K
sort_buffer_size=4M
innodb_additional_mem_pool_size=12M
innodb_flush_log_at_trx_commit=1
innodb_log_buffer_size=6M
innodb_buffer_pool_size=555M
innodb_log_file_size=10M
innodb_thread_concurrency=14
innodb_open_files = 2000
max_connections=2000
old_passwords=1
max_user_connections=300
thread_cache_size=38
thread_stack=696608
binlog_cache_size=32768
net_read_timeout=30
net_retry_count=10
net_write_timeout=30
thread_concurrency=14
open_files_limit=15000
table_cache = 1520
wait_timeout = 120
connect_timeout = 30
interactive_timeout= 30
table_lock_wait_timeout = 30
tmp_table_size=185M
delayed_queue_size=2000
flush_time = 43200



key_buffer = 684M
key_buffer_size=286M
query-cache-type = 1
query-cache-size = 182M
max_allowed_packet=64M