subreports not copied to the server when published

Hi,
I have a main report made up of several sub reports. the previsualization of it works properly in jasperstudio. the problem is that when I publish the main report on my online server, all the resources (under reports and images) are not copied. I correctly correctly configure the data source on the server and I choose it at the time of publication of the report via jaspersoft studio. what to do to properly publish my main report with all these sub reports and the images contained in it.
thank you