Create Tzconneciton in run time

Question

Good afternoon
I’m using Delphi 7 with ZEOS.
I need to create a connection in RUN TIME.
I’m trying to use the following code

Var
  Connection : TZConnection;
begin    
    Connection:= TZConnection.Create(Nil);
    Connection.HostName:= '127.0.0.1';
    Connection.Database:= 'RMS';
    Connection.Password:= '1111';
    Connection.User:= 'root';
    Connection.Port:= 3306;
    Connection.Protocol:= 'mysql-4.1';
    Connection.LoginPrompt:= False;
    Connection.TransactIsolationLevel:= tiReadCommitted;

But for some reason the line

Connection.Transactisolationlevel:= tiReadCommitted;

is returning me the following error

[Error] Unit1.pas(719): Incompatible types: 'Tztransactisolationlevel' and 'Ttransisolation'

My question is..:
I have to declare something in USES to be able to SETAR Connection.Transactisolationlevel via programming or via programming really does not set this property??
In project time I can connect and change the above property normally.
Hugs and thanks to all for your attention.