Hi,

When you first install there is a site rule in DownloadStudio that restricts RapidShare downloads by default. As a rapidshare premium user you can turn this off. Here's how:

Go to the options dialog in DownloadStudio (Tools menu > Options...)
Select the 'Site Rules' section. This is where site specific download settings can be set up.
You should see a rule 'rapidshare.*' in this list.
You can delete this rule or edit it to set the number of connections/splits you would like to use for rapidshare.