APC is installed bot not recognized by Total Cache!

I’ve just installed APC (on Bluehost shared host) and it’s running but when I want to change options to use it, it’s still grayed out!
The PHP version is: 5.2.17

Here is the APC configuration:

APC Support enabled
Version 3.1.8
APC Debugging Disabled
MMAP Support Enabled
MMAP File Mask no value
Locking type pthread mutex Locks
Serialization Support php
Revision $Revision: 308812 $
Build Date Dec 30 2012 11:29:22

Directive Local Value Master Value
apc.cache_by_default On On
apc.canonicalize On On
apc.coredump_unmap Off Off
apc.enable_cli Off Off
apc.enabled On On
apc.file_md5 Off Off
apc.file_update_protection 2 2
apc.filters no value no value
apc.gc_ttl 3600 3600
apc.include_once_override Off Off
apc.lazy_classes Off Off
apc.lazy_functions Off Off
apc.max_file_size 1M 1M
apc.mmap_file_mask no value no value
apc.num_files_hint 1000 1000
apc.preload_path no value no value
apc.report_autofilter Off Off
apc.rfc1867 Off Off
apc.rfc1867_freq 0 0
apc.rfc1867_name APC_UPLOAD_PROGRESS APC_UPLOAD_PROGRESS
apc.rfc1867_prefix upload_ upload_
apc.rfc1867_ttl 3600 3600
apc.serializer default default
apc.shm_segments 1 1
apc.shm_size 64 64
apc.slam_defense On On
apc.stat On On
apc.stat_ctime Off Off
apc.ttl 7200 7200
apc.use_request_time On On
apc.user_entries_hint 4096 4096
apc.user_ttl 7200 7200
apc.write_lock On On

I’m running the last version of Total Cache and WordPress 3.5.

https://www.ads-software.com/extend/plugins/w3-total-cache/