HPscanjet 4570c?

Hi,
I thank everybody who tryed to help me into the past but unfortunally my
scanner still doesn't work.
The scanner is working on my old ME-pc ...

To who has working the HPscanjet 4570c the following question:
-What is mentioned within the map C\Windows\Twain_32 ?

I have a map hsj_002 with the corresponding file and further a hpqgends.tmp
file

Why is there a tmp file??

Ik have Vista Premium Home and as SW only the related Vista drive is
installed.
First i installed the SW and secondly connected the scanner....with
installed with success.
The scanner can be seen into the application SW but e.g. trying to activate
the scanner in Irfanview i receive the message Twain error?

Thanks

Regards
Huib