SAP Data Services 4.2SP2 looking for SIA

Hi,

I've installed BI 4.1 SP4 and would like to install SAP Data Services on a separate server.

When I install Data services 4.2 It's asking for the hostname and credentials on the CMS which I pointed to the BI 4.1 server.

Right after that I got an error saying that No Local SIA node was detected. It also mentions something about Data Services Administrator service not running.

Am I supposed to install a second SIA on the Data Services server?

Need a little help.

Thanks

Stephane