Error in INSTALLATION

Hi experts,

i tried to install SAPinst, three steps of installation went on fine. But it got struck in fourth step "Execute service". Its prompting the error as

You entered:Unable to find a LABEL.ASC at location ><. ( look for label SAP:TREXBINARIES:700:export::WINDOWS_I386:).

can anyone help me in sorting out this error? where it will be available?

Thanks,

kannan.