unable to install add-in

[Weila Chiang]

when i tried to install the add-ins, the PC will search
for the installation file only in the floppy drive and
when it couldn't find the file, an error msg will appear

Microsoft Excel Can't run this add-in.
Microsoft Excel cannot install the necessary files due to
Windows installer error 1635.

how can i make the installer look in E:\ instead of A:\
for the installation file please? I've tried to copy
the .xla files to the floppy, but the installer still
cannot detect the file.

Thank you.

Yours,
weila