Installation of SAP NetWeaver Gateway on Front-End Server 
On your front-end server, some components have to be available as part of your SAP NetWeaver Gateway installation:
If you run SAP NetWeaver 7.31 on your front-end server, you have to install the listed components.
If you run SAP NetWeaver 7.4 on your front-end server, the listed components are automatically installed with your SAP NetWeaver installation. Verify that they are in place.
Required SAP NetWeaver Gateway Components
If you run SAP NetWeaver 7.31 SPS 04 on your front-end server, install the following SAP NetWeaver Gateway product versions:
NW Gateway Product Versions | Components That Are Automatically Installed |
|---|---|
SAP NETWEAVER GATEWAY 2.0 SPS 07 (Gateway Server Core NW 703/731) | GW_CORE 200 SAP IW FND 250 SAP WEB UIF 731 |
Only for the Approve Requests app: SAP NETWEAVER GATEWAY 2.0 SPS 07 (Gateway PGW) | IW_PGW 100 IW_BEP 200 |
If you run SAP NetWeaver 7.4 SPS 04 on your front-end server, install the following SAP NetWeaver Gateway product versions:
NW Gateway Product Versions | Components That Are Automatically Installed |
|---|---|
All required components are included in the SAP NetWeaver installation. | |
Only for the Approve Requests app: Install SAP NETWEAVER GATEWAY 2.0 SPS 07 (Gateway PGW NW 740) | IW_PGW 100 |
You can find details about the installation of SAP NetWeaver Gateway in the SAP Library for SAP NetWeaver Gateway 2.0 SPS 07 on SAP Help Portal, at 
http://help.sap.com/nwgateway20 
Application Help Support Package 07 SAP NetWeaver Gateway SAP NetWeaver Gateway Installation Guide 
.