linrad setup error

Hallo boys, 

after a Sunday afternoon passed in download ISO's and check them I was able
to make a good CD_live of W3SZ version of Linrad and now my PC load all OK.
The new problem I found is that when I am in the S mode and the program ask
the parameters, I tried the suggested or to change, but always I receive
this message: "Speed far too slow. Try less demanding FFT! Press any key.
Accept...." I made a lot of test but I've always the same answer: I see the
PC making calculations but at the end I have always this answer. Do I make
any error? Or not?
I read all the mailing list message but I did not find any similar question,
and moreover I didn't find any error message list in order to understand
what can I do to solve this?
May I have any help from someone that had the same?

I remember my PC is PIII 870 MHz CPU, 256 RAM, video Matrox 4000 16 Mb.

Thanks in advance from a newbie/Elmer on this side....

Alex I0SKK

--

-- 
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.1.371 / Virus Database: 267.13.13/197 - Release Date: 09/12/2005

#############################################################
This message is sent to you because you are subscribed to
  the mailing list <linrad@...>.
To unsubscribe, E-mail to: <linrad-off@...>
To switch to the DIGEST mode, E-mail to <linrad-digest@...>
To switch to the INDEX mode, E-mail to <linrad-index@...>
Send administrative queries to  <linrad-request@...>