I got error in sap crystal report using VS 2010

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C#

SAP

C#4.0

CrystalReports

I have developed a WPF C#.NET application in VS2010. I have downloaded and installed Crystal Reports for VS2010 and have design four reports using this feature.

I read and pass in the database login info (server,databasename,username,password) from the app.config file.

I have three client PCs. I downlaod the Crystal Reports for VS2010 and Framework 4.0 and installed on these three client PCs. I also develop my aplication on those machines.

My database server is MS SQL Server 2008 Developer Edition.

I am able to view the reports from my developer machine (which has VS2010, Crystal Reports for VS2010 and Crystal Reports for VS2010 runtime installed).

I am unable to view reports on any of the three client PCs (Only .NET 4.0 and Crystal Reports for VS2010 Runtime were installed). It came up with a Login prompt: The severname is disabled but has the servername. The databasename is blank and disable. The username & password fields were enabled with the app.config username and password.

I don't think there is an issue with SQL Authentication because the user used in app.config file can access &update the database using my application or using the Microsoft SQL Server Mgt Studio.

I am thinking the Cystal Reports for VS2010 runtime is missing some files.

If anyone facing same problem and how they resolved, please advise.

additional information copied from comment below
Actually i have created .exe in VS 2010 with SAP Crystal Report and i have installed on client PC and when i want to see report and got error

Description:
  Stopped working

Problem signature:
  Problem Event Name:	APPCRASH
  Application Name:	Billing Application.exe
  Application Version:	1.0.0.0
  Application Timestamp:	542a4fa5
  Fault Module Name:	KERNELBASE.dll
  Fault Module Version:	6.1.7601.18229
  Fault Module Timestamp:	51fb10c6
  Exception Code:	e0434352
  Exception Offset:	0000812f
  OS Version:	6.1.7601.2.1.0.256.1
  Locale ID:	1033

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