Error while running the deployed asp.net 4.0 website on IIS 7.5

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IIS7

IIS

deployment

ASP.NET4

I have an asp.net website which is developed in asp.net 4.0 with data binding from a database which is maintain in sql server 2000..
It it working fine on localhost but when I am deploying it on IIS and while running the page the following error is occurring..

Login failed for user 'sa'. Reason: Not associated with a trusted SQL Server connection.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Data.OleDb.OleDbException: Login failed for user 'sa'. Reason: Not associated with a trusted SQL Server connection.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

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-> I am using mixed mode authentication and sql server 2008 is installed on my system
-> I am using the following connection string in my .cs page

using (OleDbConnection con3 = new OleDbConnection("Provider=SQLOLEDB;Data Source=192.168.2.4;Persist Security Info=True;User ID=sa;Initial Catalog=PCGWORK"))