Connectivity to check the username and pass word but shows an error in the Connection con line

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JSP

<%
String user=request.getParameter("user");
String pass=request.getParameter("pass");
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver").newInstance();
Connection con=DriverManager.getConnection("jdbc:sqlserver://localhost\LAMOTH-PC\LAMOTH:65271;databaseName=Rainbow_Entertainment","sa","chiller7");
Statement st=con.createStatement();
ResultSet rs=st.executeQuery("select * from users where UserName='"+user+"' and Password='"+pass+"'");
int count=0;
while(rs.next())
{

count++;
}

if(count>0)
{
response.sendRedirect("User page.jsp");
}
else
{
response.sendRedirect("home page.jsp");
}
%>