How can i Implementing a Session-State Store Provider

Question

Hi all, 

 

i want to implement  a Session-State Store Provider using mode = "custom" and using MSSQL 2008 from this link:

https://msdn.microsoft.com/en-us/library/ms178587.aspx

 

but there is an error from this demo:

"

An exception of type 'System.Data.Odbc.OdbcException' occurred in App_Code.v9izyd2w.dll but was not handled in user code

Additional information: ERROR [IM002] [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified

"

Please help me to resolve this problem.

I run this demo on: win7 64 bit and sql server 2008 and .net framework is 4.5 and visual studio ultimate 2013

this is my sample code:

https://www.mediafire.com/?e11d16qee4yihd5

Thank you very much!