How to store PDFimage file in sql Server using FileUpload Control in asp.net

Hi, 

I am novice programmer, I refer your article to learn how to use File Upload Control in aspx file. 

http://www.aspsnippets.com/Articles/Save-Files-to-SQL-Server-Database-using-FileUpload-Control.aspx

But I cann't get proper output.... :(  File was not stored in database. Its give error like- 'Cannot open database "dbFiles" requested by the login. The login failed. Login failed for user 'hello55-PC\hello55'.

So, Plz...let me know, where and what is the problem...I use your downloaded code. 

Reply me ASAP.....Thank you in advance....:) :)