We do not support the use of DTS packages in SQL Enterprise Manager. These packages present a security problem for our customers since they are viewable by everyone who has access to that server. Someone could then find the login information and database information for your SQL database.
For this reason, we do not allow you to save DTS packages to the server. If you are going to use a DTS package, it must be saved locally. Further, the functionality of DTS can be achieved with scripts written in ASP, ASP.NET, ColdFusion, Perl, etc. This kind of script can then be scheduled to run from the Control Center.