The file may have been manually modified

Hi all


Never scene this one before, I am trying to upgrade a customers install of AV for Server 9.00 to Email & Server Security.


I get this message in the policy manager status " # Operation Status
1 Upgrading from F-Secure Anti-Virus for MS Exchange 9.00 to F-Secure E-mail and Server Security 9.20 in "logo-sbs-01" host Failed: F-Secure Management Agent: The file C:\Program Files (x86)\F-Secure\Common\CommDir\install\distrib\ess920_1332928996367.jar did not pass signature verification. The file may have been manually modified. If the problem persists, please contact the system administrator"


I tried re-downloading the original jar still the same =/


Anyone know why this is happening and how to fix it?


Thanks in advance


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