Every object in your Reporting Services has a security link. If you have Admin rights on the Reports page, click the Show Details button on the top right of the page. Then click edit for any item (folder, report, data source) and add the users to the security, giving them the appropriate security.
Also, when you are at the Home page and change to Show Details, you should see a Permissions tab...you will need to add the users here as well.
Depending on your scenario, just adding them to the Home may be enough. This is because all objects inherit from its parent. So all folders on the Home page automatically get the same security as the Home page and so on.
I personally set all the permissions at the Home page level. Then anywhere I have a report I do not want specific users to have access to, such as Accounting reports, I go to the security for that folder and break the inheritance. I can then add specific users/groups at that folder's root and all the reports in that folder can only be accessed by certain individuals.
Hope this helps. Let me know if not.
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People think it must be fun to be a super genius, but they don't realize how hard it is to put up with all the idiots in the world. (Calvin from Calvin And Hobbs)
Robert L. Johnson III
CCNA, CCDA, MCSA, CNA, Net+, A+, CHDP
VB/Access Programmer