How to set the current connectionString user as a defualt value?

Hi,

I'm using username & password in my connectionString to connect my program (C#.net) with Sql Server 2005..

I put in defualt value in one feild: user_name()

it replace the user: dbo, not the user which I used in my connectionString.

so.. how to get this user?

I tried to put: currnet_user

but I get the same result, "dbo" not the user in my connectionString..

I tried SESSION_USER, it gave the same result :(|||

This is my connectionString:

connectionString="Provider=SQLOLEDB;Data Source=LEWEHSBF\LEWEENG;Persist Security Info=True;Password=HsBfL4w4;User ID=Lewe;Initial Catalog=MyDatabase"

|||

I think the resone is the user I which I used in myConnectionString, is Admin user, I tried with "dataread, datawrite" user and its worked..

Thank you myself