Print Error - An communication error occurred. Printing will be stopped

Question

Hi,
I am using Crystal Report web forms for launching the reports.  Report is getting launched and export is working perfectly but when I click on the print button activex printing is enabled and error is thrown stating that u201CAn communication error occurred.  Printing will be stoppedu201D. 
Crystal Report Version : Crystal Reports 2008 (SP0)
Web server Operating System : Windows 2003 R2 (SP 2)
When I analyze the following error is raised in the event viewer.
Event viewer
Event code: 4009
Event message: Viewstate verification failed. Reason: The viewstate supplied failed integrity check.
Event time: 6/4/2010 2:29:55 PM
Event time (UTC): 6/4/2010 8:59:55 AM
Event ID: 9d894136fcb445ec81671b10955d0e17
Event sequence: 215
Event occurrence: 16
Event detail code: 50203
Application information:
    Application domain: /LM/W3SVC/1/Root/RVW-1-129200975917656866
    Trust level: Full
    Application Virtual Path: /RVW
    Application Path: D:\Program Files (x86)\VirtualWorks\IIS\
    Machine name: TESTSERVER
Process information:
    Process ID: 5516
    Process name: w3wp.exe
    Account name: NT AUTHORITY\SYSTEM
Edited by: Don Williams on Jun 4, 2010 8:41 AM

Answer 1

Request information:
    Request URL: http://testserver/rvw/REPSPM/csol-pm-018-01.aspx?CO=REPSPM&AC=pmrptpi&IL=pmrptpi&TB=&EN=pmrptpitrn1&RC=rptstr&RT=crystal&ICT_ACTIVITYNAME=PMRPTPI&ICT_ILBOCODE=PMRPTPI&ServletTask=Print&cmd=get_res&langcode=en
    Request path: /rvw/REPSPM/csol-pm-018-01.aspx
    User host address: 192.168.1.4
    User: 
    Is authenticated: False
    Authentication Type: 
    Thread account name: NT AUTHORITY\SYSTEM
ViewStateException information:
    Exception message: Invalid viewstate.
    Client IP: 192.168.1.4
    Port: 4316
    User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; WOW64; SV1; .NET CLR 2.0.50727)
    PersistedState: /wEPDwUKMTc3MjkxOTc4Mw9kFgJmD2QWAgIBDxcAZGQ/o4+20T9q1Qyli8msLgA1rBSiZw==
    Referer: 
    Path: /rvw/REPSPM/csol-pm-018-01.aspx
Custom event details:
For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
When I verify the fiddler response it is showing the following error
Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.
I tried the following settings
1. for the c:\windows\temp folder I had given full permission to the user u201CEveryoneu201D
2. In the web.config file I had incorporated the following settings
<configSections>
    <sectionGroup name="businessObjects">
      <sectionGroup name="crystalReports">
        <section name="crystalReportViewer" type="System.Configuration.NameValueSectionHandler" />
      </sectionGroup>
    </sectionGroup>
  </configSections>
  <businessObjects>
    <crystalReports>
      <crystalReportViewer>
           <add key="resourceURI" value="/crystalreportviewers12" />
      </crystalReportViewer>
    </crystalReports>
  </businessObjects>
Could anybody help me for rectifying this issue