'System.InvalidOperationException' -error!

The code below stops as I try to open a connection. I get the following error:

ServerVersion = 'sqlConnection1.ServerVersion' threw an exception of type 'System.InvalidOperationException'


string qry = "";

qry = string.Format("insert into dbo.member(mbrFirstName, mbrLastName, mbrStreetAddress, mbrPostalAddress, mbrTelephoneNumber, mbrTelephoneJob, mbrEmail) values('{0}','{1}','{2}','{3}','{4}','{5}','{6}')", sql1, sql2, sql3, sql4, sql5, sql6, sql7);

cmd.CommandText = qry;

cmd.Connection = sqlConnection1;



sqlConnection1.Open(); //Code stops here!!!

cmd.ExecuteNonQuery();

sqlConnection1.Close();
Does anyone know what is wrong? I appreciate any help!