Setting up MailScanner + Postfix

[Gioia Bastioni]

Hi guys,
after my postfix-MS installation I got the following:
When I try to send messages (no body, no attach, just blank messages)
they are all blocked as "corrupted" queue files..
and I finally do not receive nothing ..
anyone can help me ?
here's what my maillog says

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Nov 18 14:18:34 testmail MailScanner[984]: MailScanner E-Mail Virus Scanner version 4.24-5 starting... 
Nov 18 14:18:34 testmail MailScanner[984]: Using locktype = flock 
Nov 18 14:18:34 testmail MailScanner[984]: Postfix queue structure is depth 1 
Nov 18 14:18:34 testmail MailScanner[984]: New Batch: Scanning 2 messages, 3019 bytes 
Nov 18 14:18:39 testmail MailScanner[984]: Virus and Content Scanning: Starting 
Nov 18 14:18:41 testmail MailScanner[984]: Uninfected: Delivered 2 messages 
Nov 18 14:18:41 testmail postfix/qmgr[876]: 2EE8B6048B: from=<test1 at domain.com>, size=2320, nrcpt=2 (queue active)
Nov 18 14:18:41 testmail postfix/qmgr[876]: 2CCDC6048D: from=<test2 at mytestdomain.it>, size=3270, nrcpt=2 (queue active)
Nov 18 14:18:42 testmail postfix/local[991]: warning: corrupted queue file: active/2/2EE8B6048B
Nov 18 14:18:42 testmail postfix/local[992]: warning: corrupted queue file: active/2/2CCDC6048D
Nov 18 14:18:42 testmail postfix/qmgr[876]: warning: saving corrupt file "2EE8B6048B" from queue "active" to queue "corrupt"
Nov 18 14:18:42 testmail postfix/qmgr[876]: warning: saving corrupt file "2CCDC6048D" from queue "active" to queue "corrupt"
Nov 18 14:18:44 testmail MailScanner[993]: MailScanner E-Mail Virus Scanner version 4.24-5 starting... 
Nov 18 14:18:44 testmail MailScanner[993]: Using locktype = flock 
Nov 18 14:18:54 testmail MailScanner[994]: MailScanner E-Mail Virus Scanner version 4.24-5 starting... 
Nov 18 14:18:54 testmail MailScanner[994]: Using locktype = flock 
Nov 18 14:19:04 testmail MailScanner[1001]: MailScanner E-Mail Virus Scanner version 4.24-5 starting... 
Nov 18 14:19:04 testmail MailScanner[1001]: Using locktype = flock 
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thanks