Changing User Name In A Table?

I am using profiles to store extra information about users. The thing that I want is that I am changing user name. But on the other side I have photo album gallery where I have stored the User name (Creator of album). These two tables (aspnet_Profiles and PhotoAlbum) are in different databases.

I have tried the following code while changing the user name

Private con As New SqlConnection(ConfigurationManager.ConnectionStrings("Photo").ConnectionString)
Dim updateSql As String = "UPDATE PhotoAlbum SET UserName = @UserName WHERE UserName = " & userName.Text
con.Open()
Dim myCommand As New SqlCommand(updateSql, con)
myCommand.Parameters.AddWithValue("@UserName", newUsername)
myCommand.ExecuteNonQuery()
con.Close()

Here newUserName is the new user name field and UserName is the previous name stored in PhotoAlbum table.

But it does not seems to work.On debugging it reports Invalid Column Name "userName"