Why it tries to connect on http 80?

[marcosia]

Hi guys,

I have an RTD Server (Excel 2002) on a Server and the same dll on the client. If I type RTD in an Excel cell, Excel connects to the IIS on the server but suddenly I see that the server tries to connect to the client on HTTP 80 but the client havn't IIS and results in failure... Why the server tries to do a second connection to the client? I think it is for the call back but why the callback can't use the same connection? there is a way to do this?

Thanks...