1 Invalid Serial Number: 7466_56/_vti_bin/sites.asmx

Hi,

I’m having error on event log in my SharePoint 2010 Server saying

“1 Invalid Serial Number: <some4Digitnumber_2digitNumber>/_vti_bin/sites.asmx”

Event ID  = 1

I’m post the event log here. Does anybody have idea what is this issue and how can I fix this. Now it is occurring around three times per minute

“SourceCode.Logging.Extension.EventLogExtension” is this related to K2 workflows ?

Log Name:      Application

Source:       SourceCode.Logging.Extension.EventLogExtension

Date:        2/28/2013 12:25:56 PM

Event ID:      1

Task Category: None

Level:       Error

Keywords:      Classic

User:        N/A

Computer:      “SERVER Name”

Description:

1 Invalid Serial Number: 7453_56/_vti_bin/sites.asmx

Event Xml:

<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">

  <System>

    <Provider Name="SourceCode.Logging.Extension.EventLogExtension" />

    <EventID Qualifiers="0">1</EventID>

    <Level>2</Level>

    <Task>0</Task>

    <Keywords>0x80000000000000</Keywords>

    <TimeCreated SystemTime="2013-02-28T08:25:56.000000000Z" />

    <EventRecordID>8205943</EventRecordID>

    <Channel>Application</Channel>

    <Computer>“SERVER Name”</Computer>

    <Security />

  </System>

  <EventData>

    <Data>1 Invalid Serial Number: 7453_56/_vti_bin/sites.asmx</Data>

  </EventData>

</Event>

Thanks in Advance

Tharindu