Event ID 1309 ASP.NET An unhandled exception has occurred

Windows 2012 R2 64 BIT Web Server
IIS 8.5

After moving my sites from a Windows 2003 Web Server  with IIS 6 I am seeing this error several times a day.

Log Name:      Application
Source:        ASP.NET 4.0.30319.0
Date:          6/6/2015 5:21:00 AM
Event ID:      1309
Task Category: Web Event
Level:         Warning
Keywords:      Classic
User:          N/A
Computer:      SERV013.FQDN.com
Description:
Event code: 3005
Event message: An unhandled exception has occurred.
Event time: 6/6/2015 5:21:00 AM
Event time (UTC): 6/6/2015 9:21:00 AM
Event ID: 8df34263c84a4745abdf8d581ee99f63
Event sequence: 2
Event occurrence: 1
Event detail code: 0
 
Application information:
    Application domain: /LM/W3SVC/2/ROOT-1-130780560606599714
    Trust level: Full
    Application Virtual Path: /
    Application Path: C:\inetpub\wwwroot\Music\
    Machine name: SERV013
 
Process information:
    Process ID: 32
    Process name: w3wp.exe
    Account name: IIS APPPOOL\Music
 
Exception information:
    Exception type: HttpException
    Exception message: A potentially dangerous Request.Path value was detected from the client (&).
   at System.Web.HttpRequest.ValidateInputIfRequiredByConfig()
   at System.Web.HttpApplication.PipelineStepManager.ValidateHelper(HttpContext context)

 
 
Request information:
    Request URL: http://www.tomsmp3.com/mp3/mp3musicalbums/&artistname&/&recordingtitle&/&trackfilename& 
    Request path: /mp3/mp3musicalbums/&artistname&/&recordingtitle&/&trackfilename&amp
    User host address: 162.210.196.98
    User:  
    Is authenticated: False
    Authentication Type:  
    Thread account name: IIS APPPOOL\Music
 
Thread information:
    Thread ID: 8
    Thread account name: IIS APPPOOL\Music
    Is impersonating: False
    Stack trace:    at System.Web.HttpRequest.ValidateInputIfRequiredByConfig()
   at System.Web.HttpApplication.PipelineStepManager.ValidateHelper(HttpContext context)
 
 
Custom event details: Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="ASP.NET 4.0.30319.0" />
    <EventID Qualifiers="32768">1309</EventID>
    <Level>3</Level>
    <Task>3</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2015-06-06T09:21:00.000000000Z" />
    <EventRecordID>18215</EventRecordID>
    <Channel>Application</Channel>
    <Computer>SERV013.FQDN.com</Computer>
    <Security />
  </System>
  <EventData>
    <Data>3005</Data>
    <Data>An unhandled exception has occurred.</Data>
    <Data>6/6/2015 5:21:00 AM</Data>
    <Data>6/6/2015 9:21:00 AM</Data>
    <Data>8df34263c84a4745abdf8d581ee99f63</Data>
    <Data>2</Data>
    <Data>1</Data>
    <Data>0</Data>
    <Data>/LM/W3SVC/2/ROOT-1-130780560606599714</Data>
    <Data>Full</Data>
    <Data>/</Data>
    <Data>C:\inetpub\wwwroot\Music\</Data>
    <Data>SERV013</Data>
    <Data>
    </Data>
    <Data>32</Data>
    <Data>w3wp.exe</Data>
    <Data>IIS APPPOOL\Music</Data>
    <Data>HttpException</Data>
    <Data>A potentially dangerous Request.Path value was detected from the client (&).
   at System.Web.HttpRequest.ValidateInputIfRequiredByConfig()
   at System.Web.HttpApplication.PipelineStepManager.ValidateHelper(HttpContext context)

</Data>
    <Data>http://www.tomsmp3.com/mp3/mp3musicalbums/&amp;artistname&amp;/&amp;recordingtitle&amp;/&amp;trackfilename&amp</Data>
    <Data>/mp3/mp3musicalbums/&amp;amp;artistname&amp;amp;/&amp;amp;recordingtitle&amp;amp;/&amp;amp;trackfilename&amp;amp</Data>
    <Data>162.210.196.98</Data>
    <Data>
    </Data>
    <Data>False</Data>
    <Data>
    </Data>
    <Data>IIS APPPOOL\Music</Data>
    <Data>8</Data>
    <Data>IIS APPPOOL\Music</Data>
    <Data>False</Data>
    <Data>   at System.Web.HttpRequest.ValidateInputIfRequiredByConfig()
   at System.Web.HttpApplication.PipelineStepManager.ValidateHelper(HttpContext context)
</Data>
  </EventData>
</Event>


Thoughts


Thanks in advance

Tom