Error: Retrieving the COM class factory for component with CLSID {0006F03A-0000-0000-C000-000000000046} failed due to the following error: 80070005

Ryan: Thanks for your quick response. The server is on my CPU where the Outlook is installed.

Yes. Outlook is installed on all of the client machines, incluing my CPU. If I code like that
<p class="h3" style="margin-top: 0px;">
If you have a question or want to report a bug, or write a comment, please contact Mr. xxx (syoo@wmata.com) for details.
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it is fine to pop out the Outlook. However, when I use this piece of code below:
public void SendEmailthroughOutlook(string emailAddressTo, string sSubject, string sText) {
// http://stackoverflow.com/questions/11736598/open-outlook-window-to-send-email-asp-net
Application app = new Application();
NameSpace ns = app.GetNamespace("mapi");
MailItem message = (MailItem)app.CreateItem(OlItemType.olMailItem);
message.To = emailAddressTo;
sSubject = "Subject: " + sSubject;
message.Subject = sSubject;
message.Body = sText;
message.Send();
ns.Logoff();
}
it works only if run VS. For the published, the error throws out.
Thanks anyway.