Issue regarding SM700 installtion

Hello All experts,

When I installed a SM7 server, I met a problem as below, Could anyone give me some advice?

Problem:

As per the installtion guide said, after double-click SAPINST.exe, welcome screen will appear, in this screen, the installer can choose one of the selection options:

-- SAP Systems

-- Software Life-Cycle Options

BUT, after I double-click SAPINST.exe, there are still two selection options appear on welcome screen, but they are:

-- SAP Solution Manager Diagnostics Agent

-- Software Life-Cycle Options

that is, I have no choise to choose the Central System, coz the menu -- SAP Systems does not appear at all.

Note: I have not install NW70SP14 on this server before install SM7.

Thanks in advance for giving me some advice of this problem.

BR,

Karl