need help getting fedora 6 to boot with speech

[Corey Knapp]

    Hi Listers,
I am having a great difficulty getting fedora 6 to boot up with speech using
the double talk external.
I have tried the dvd the boot iso and the rescue iso.  I can get the fedora
3 boot iso to run but the fedora 6 never comes up with speech.
here is the command that I am issuing
text speakup_synth=ltlk
thanks for any help in advance.
Corey