Connecting to Database Issue

Question

   Hello everyone,

       I'm new here, hope you can help me out guys. I am doing a web application in VB.Net
  
       and I'm trying to connect to MSSQL Server through OLEDB and SQL Connection. But every

       time I run the program, the message always appear "Log in failed in user"(Computername)".    

       I tried the OLEDB

       and SQL Connection in Windows form and it worked unliked what happened in my web 

       application. Hope I can receive a reply ASAP.. Thanks in advance ! ! ! ^_^