Problem with queue

I use Asterisk 1.4.35. I have configured the queue.

[general]

persistentmembers=yes
monitor-type=MixMonitor

[Info]
autopause=no
music=default
monitor-format=wav
monitor-join=no
strategy=rrmemory
eventwhencalled=yes
reportholdtime=no
timeout=60
retry=5
wrapuptime=0
maxlen = 0
periodic-announce-frequency=30
periodic-announce = queue-periodic-announce
joinempty=yes
ringinuse=no

Agents to dynamically join the queue using the following functions:

exten => 301,1,AddQueueMember(Info|SIP/${CALLERID(num)});

After about 20 hours Asterisk works, some agents are no longer getting calls.
Only helps restart asterisk.
Can anyone help me? What can I do to agents all the time receive a calls. Already been checked various strategies.

I attach the result of: show queue Infolinia
Info has 0 calls (max unlimited) in ‘rrmemory’ strategy (65s holdtime), W:0, C:83, A:4, SL:1.2% within 0s
Members:
SIP/102 (dynamic) (In use) has taken 1 calls (last was 135 secs ago)
SIP/103 (dynamic) (Not in use) has taken 3 calls (last was 51 secs ago)
SIP/101 (dynamic) (In use) has taken no calls yet
No Callers

Regars
Rafal