Problem starting apache width module auth_digest

[cgoncalves]

Hi,

I'm using xampp 1.8.1 (apache 2.4.3) and when I try to start apache with module "auth_digest_module", but I getting this error:

[Fri Apr 12 12:52:58.385791 2013] [auth_digest:notice] [pid 2168:tid 228] AH01757: generating secret for digest authentication ...
[Fri Apr 12 12:52:58.385791 2013] [auth_digest:error] [pid 2168:tid 228] (OS 5)Access is denied. : AH01762: Failed to create shared memory segment on file C:/xampp-apache-2.4.3/apache/logs/authdigest_shm.2168
[Fri Apr 12 12:52:58.385791 2013] [auth_digest:error] [pid 2168:tid 228] (OS 5)Access is denied. : AH01760: failed to initialize shm - all nonce-count checking, one-time nonces, and MD5-sess algorithm disabled
[Fri Apr 12 12:52:58.385791 2013] [:emerg] [pid 2168:tid 228] AH00020: Configuration Failed, exiting

And apache server doesn't start
Is there anyone with the some problem?

Best Regards,
Carlos