an unhandled exception of type System.Data.SqlClient.SqlException occured in System.Data.dll

Additional information : System Error

and the line of code highlighted is :

VB Code:
  1. ... blablabla connectionstring
  2. conn.open
  3.  
  4.  
  5. [B]SqlConnection sc = new SqlConnection ("Data Source=myDB;Initial Catalog=pubs;username=guest;password=",conn)
  6. [/B]