pdf activex control in delphi

[ewin]

I tried to use A Pdf ActiveX control "Pdf.ocx".
I installed it in the delphi.
The problem is that if I use the command "Pdf.openfile('C:\Test.pdf');", it gives the runtime error "Interface not supported".
And if I use the command "Pdf.src = 'C:\Test.Cmd';",
it works fine, but if I try that compiled program in another computer, I get An Error.
I have the file "Pdf.tlb" too, but don't know what to do with it.

[Kambiz]

Is the ActiveX installed on the other computer?