Hi,
Sorry I noticed you mentioning Windows 8 as OS. SAP note 1225606 suggests that the platform is not supported.
"SAP Netweaver Developer Studio 2.0 and SAP Netweaver Developer Studio 7.0 and Enhancement Packages for SAP NetWeaver Developer Studio 7.0 are available for the operating systems: Windows XP Prof. 32-bit and Windows 2000 Prof.
No other Platforms are supported. There is no support of additional platforms like Windows Vista in future Enhancement Packages planned."