Subreport errors

Hi,
First of i ame totally new to reports in visual studio, i'm sorry if i ask stupid questions :p

I ame currently trying to create a report that contains a few subreports.
With the current reports there are no parameters passed along.

When i create the reports and show them separately in the report viewer they work just fine.
Attachment 100045
However when i add them into a report as a subreport i get the following error.
Attachment 100047

When i check the log file referred by the error i get this:
Attachment 99843

However i don't really understand it.

If anyone has better knowledge about reports and subreports help would be very much appriciated!