Problem with mailscanner

[Rupen Momaya]

Hi,
I am running mailscanner + postfix with below versions on CentOS 4.5
box. Suddenly we started getting below error messages and mails were
queing up. I re-isntalled Mail::ClamAV module, upgraded Clam version
to 0.91.2, disabled clam from Mailscanner but nogo...When i disable
Mailscanner completely & run only postfix it works fine & mails start
gettign delivered....
I have googled but didnt find this error anywhere..Can someone help here?

----------------------------------
Nov 23 02:04:04 netbox MailScanner[4594]: Virus and Content Scanning: Starting
Nov 23 02:04:05 netbox MailScanner[4595]: New Batch: Scanning 1
messages, 722 bytes
Nov 23 02:04:05 netbox MailScanner[4595]: Failed to create message
structures for 80FBF424001.9CE89, dropping it from the bat
ch
Nov 23 02:04:05 netbox MailScanner[4595]: Virus and Content Scanning: Starting
Nov 23 02:04:06 netbox MailScanner[4597]: New Batch: Scanning 1
messages, 722 bytes
Nov 23 02:04:06 netbox MailScanner[4597]: Failed to create message
structures for 80FBF424001.6697B, dropping it from the bat
ch
Nov 23 02:04:06 netbox MailScanner[4597]: Virus and Content Scanning: Starting
Nov 23 02:04:07 netbox MailScanner[4598]: New Batch: Scanning 1
messages, 722 bytes
Nov 23 02:04:07 netbox MailScanner[4598]: Failed to create message
structures for 80FBF424001.5B9BC, dropping it from the bat
ch
Nov 23 02:04:07 netbox MailScanner[4598]: Virus and Content Scanning: Starting
Nov 23 02:04:11 netbox MailScanner[4578]: New Batch: Scanning 1
messages, 722 bytes
Nov 23 02:04:11 netbox MailScanner[4578]: Failed to create message
structures for 80FBF424001.7EAC6, dropping it from the bat
ch
Nov 23 02:04:11 netbox MailScanner[4578]: Virus and Content Scanning: Starting
Nov 23 02:04:14 netbox MailScanner[4594]: New Batch: Scanning 1
messages, 722 bytes
Nov 23 02:04:14 netbox MailScanner[4594]: Failed to create message
structures for 80FBF424001.DD424, dropping it from the bat
ch
----------------------------------------------------------------

Versions :
MailScanner-perl-MIME-Base64-3.05-5
mailscanner-4.45.4-1
postfix-2.2.10-1.1.el4

[root at linbox postfix]# ls -al /var/spool/MailScanner/
total 28
drwxr-xr-x    4 root    root     4096 Nov 28  2005 .
drwxr-xr-x   18 root    root     4096 Nov 23 20:40 ..
drwx------    2 postfix postfix  4096 Nov 24 11:40 incoming
drwx------  162 postfix nobody  12288 Nov 23 12:29 quarantine


Regards,
Rupen