c# - Response.Redirect won't send me to next page -

i ran big problem here dont know in anymore. before added login system response.redirect worked charm. know login works fine ran debug on , files works fine , goes on should.

edit 1: noticed if commentate master.userlogin(arr); out default btnlogin_click , type server.transfer(@"~\admin\side.aspx"); works again dont see why making session stop response?

edit 2: okay seems has site.master.cs create session varriabler , after tries redirect page. how fix this?

default.aspx.cs

protected void btnlogin_click(object sender, eventargs e) {     db.connopenhelpdesk();     if (db.helpdeskdblogin(txtbrugernavn.text, txtpassword.text).count() == 8)     {         if (db.helpdeskdblogin(txtbrugernavn.text, txtpassword.text)[7] == "2" || db.helpdeskdblogin(txtbrugernavn.text, txtpassword.text)[7] == "1")         {             master.userlogin(db.helpdeskdblogin(txtbrugernavn.text, txtpassword.text));         }     }     else     {         db.connclosehelpdesk();         lblerror.forecolor = color.red;         lblerror.visible = true;         lblerror.text = "dit brugernavn og password passer ikke sammen prøv igen.";     }     //master.userlogin(txtbrugernavn.text, txtpassword.text); } 

dbcontrol.cs

public string[] helpdeskdblogin(string brugernavn, string password) {     string sql = "select * admin brugernavn = '" + brugernavn + "' , password = '" + password + "'";     sqlcommand command = new sqlcommand(sql, m_helpdeskconnection);     sqldatareader reader = command.executereader();     if (reader.hasrows)     {         while (reader.read())         {             arr = new string[8] { "" + reader["id"], "" + reader["brugernavn"], "" + reader["password"], "" + reader["email"], "" + reader["telefonnr"], "" + reader["navn"], "" + reader["nytpass"], "2" };         }         reader.close();         return arr;     }     else     {         reader.close();         string sql2 = "select * kunder brugernavn = '" + brugernavn + "' , password = '" + password + "'";         sqlcommand command2 = new sqlcommand(sql2, m_helpdeskconnection);         sqldatareader reader2 = command2.executereader();         if (reader2.hasrows)         {             while (reader.read())             {                 arr = new string[8] { "" + reader["kundenr"], "" + reader["brugernavn"], "" + reader["password"], "" + reader["email"], "" + reader["telefonnr"], "" + reader["navn"], "" + reader["nytpass"], "1" };             }             reader2.close();             return arr;         }          else         {             reader2.close();             string[] arr = new string[1];             return arr;         }     } } 

site.master.cs

public void userlogin(string[] arr) {     if (arr[7] == "1")     {         session["kundenr"] = arr[0];         session["brugernavn"] = arr[1];         session["email"] = arr[3];         session["telefonnr"] = arr[4];         session["kundenavn"] = arr[5];         session["nytpass"] = arr[6];         session["rang"] = arr[7];         response.redirect(@"~\bruger\side.aspx");     }     else if (arr[7] == "2")     {         session["kundenr"] = arr[0];         session["brugernavn"] = arr[1];         session["email"] = arr[3];         session["telefonnr"] = arr[4];         session["kundenavn"] = arr[5];         session["nytpass"] = arr[6];         session["rang"] = arr[7];         response.redirect(@"~\admin\side.aspx");     } } 

you not setting authentication cookies. result, user redirected login screen since not have rights view internal pages of website.