Can't add SAP Java AS on NWDS 7.3

Hi,

I've downloaded NWDS 7.3 (SAP NetWeaver 7.3 SP07 PAT0005) and I'm trying to connect it with my EP (Kernel Version: 7.30.3710.159124.20110824120645). I'm going to Windows -> Preferences -> SAP AS Java and click on Add button.

I'm entering the host instance name and instance number (Instance Number: 56) and, when I click on OK button nothing happens... If I enter a wrong host instance name or a wrong instance number the NWDS shows me an error message. Otherwise, if everything is correct, it just closes the popup window and returns to the SAP AS Java initial screen with no system on it.

I really appreciate any help.

Thanks,

Nelson Bertolino