How can I solve this problem?::Compiler Error Message: CS0433: The type ‘CrystalDecisions.Web.Crysta

I upgraded my web application from visual studio 2003 to 2008. When I want to create a report in visual studio 2008 and receiving this error at runtime. I am able to compile but when runnning thats when I am getting this error.

How can I solve this problem? please help.

Compilation Error


Server Error in ‘/IRPSDEV’ Application.


Compilation Error
Description:
An error occurred during the compilation of a resource required to service
this request. Please review the following specific error details and modify your
source code appropriately.

Compiler Error Message: CS0433: The
type ‘CrystalDecisions.Web.CrystalReportViewer’ exists in both
‘c:WINDOWSassemblyGAC_MSILCrystalDecisions.Web10.5.3700.0__692fbea5521e1304CrystalDecisions.Web.dll’
and ‘c:WINDOWSMicrosoft.NETFrameworkv2.0.50727Temporary ASP.NET
Filesirpsdev9e97e0a994a2ecdassemblydl3151eb5710df56e1_6064c201CrystalDecisions.Web.DLL’

Source
Error:

Line 161:        
Line 162:        [System.Diagnostics.DebuggerNonUserCodeAttribute()]
Line 163:        private global::CrystalDecisions.Web.CrystalReportViewer @__BuildControlCrystalReportViewer1() {
Line 164:            global::CrystalDecisions.Web.CrystalReportViewer @__ctrl;
Line 165:            

Source
File:
c:WINDOWSMicrosoft.NETFrameworkv2.0.50727Temporary ASP.NET
Filesirpsdev9e97e0a994a2ecdApp_Web_customsapprovedcalimsreport.aspx.cdcab7d2.qc0hdu8q.0.cs
   Line: 163

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Detailed Compiler Output:

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Complete Compilation Source:

Do you have the CrystalDecisions.Web.dll in the bin folder of your web  application? Remove it and try compiling./

Hi,I am having the same problem  .Compiler error  Message: CS0433: The type  ‘CrystalDecisions.CrystalReports.Engine.TextObject’ exists in both ‘c:WINDOWSassemblyGAC_MSILCrystalDecisions.CrystalReports.Engine12.0.2000.0__692fbea5521e1304CrystalDecisions.CrystalReports.Engine.dll’ and ‘c:WINDOWSassemblyGAC_MSILCrystalDecisions.CrystalReports.Engine10.2.3600.0__692fbea5521e1304CrystalDecisions.CrystalReports.Engine.dll’Source Error:Line 371: CrystalReport_DDW1 rpt = new CrystalReport_DDW1();