after publishin database cannot be found error: 26 - Error Locating Server/Instance Specified

error: 26 - Error Locating Server/Instance Specified

encountered after publishing application

it worked:

this is what i did

1.
loginUrl="~/Login.aspx"
protection="All"
timeout="30"
path="/"
requireSSL="false"
slidingExpiration="true"
defaultUrl="~/Default.aspx"
cookieless="UseDeviceProfile"
enableCrossAppRedirects="false"/>


2. defaultProvider="CustomizedRoleProvider">

<remove name="CustomizedRoleProvider"/>
type="System.Web.Security.SqlRoleProvider" />



defaultProvider="CustomizedMembershipProvider">


minRequiredNonalphanumericCharacters="0" requiresUniqueEmail="false"
passwordFormat="Hashed" applicationName="SageWebPortal" name="CustomizedMembershipProvider"
type="System.Web.Security.SqlMembershipProvider" />