PureMessage 3.1.3

I am getting an error on one of my Exchange 2007 Hub Transport servers which has PureMessage 3.1.3 on it. The event id is:

Log Name:      Application
Source:        PureMessage
Date:          3/27/2014 9:54:48 AM
Event ID:      4
Task Category: None
Level:         Warning
Keywords:      Classic
User:          N/A
Computer:      XXXXXXXXXXXXXXXXX
Description:
Threat detection data is too old. Please update Sophos Anti-Virus.
Event Xml:
<Event xmlns="schemas.microsoft.com/.../event&quot;>
  <System>
    <Provider Name="PureMessage" />
    <EventID Qualifiers="40960">4</EventID>
    <Level>3</Level>
    <Task>0</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2014-03-27T13:54:48.000Z" />
    <EventRecordID>9475004</EventRecordID>
    <Channel>Application</Channel>
    <Computer>XXXXXXXXX</Computer>
    <Security />
  </System>
  <EventData>
  </EventData>
</Event>

 It happens over, and over, and over... You get the point. I am able to do an update succerssfully. I have rebooted the server.