getting connection error

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C#

ASP.NET4

Hi, I've implemented a application and checked. It is working properly. Then I've posted(uploaded) application in local server in my system (i.e IIS 5.1). while I'm trying to execute the application using localhost( eg xxx.xxx.x.xx/name) it is providing below error.

A connection was successfully established with the server, but then an error occurred during the login process. (provider: TCP Provider, error: 0 - An existing connection was forcibly closed by the remote host.)

can anyone suggest me how to resolve this error. I've used the connection string as follows:

<configuration>
    <appSettings>
        <add key="connect" value="Data Source=192.168.1.53,8080;Network Library=DBMSSOCN;Initial Catalog=BPO;Integrated Security=True"/>
    </appSettings>
    <connectionStrings>
        <add name="Pubs" connectionString="Data Source=192.168.1.53,8080;Network Library=DBMSSOCN;Initial Catalog=BPO;Integrated Security=True"/>
    </connectionStrings>

I've tried alot in different ways based on the information which available on internet. Still the problem wasn't fixed. so, any one please guide me regarding this.