Sarge iso won't boot

[Jonathan Viney <jonathan@neuron.net.nz>]

Hi,

I just downloaded a current sarge iso but it won't boot on my machine. 
It gives the error:

/usr/src/debian-installer/tools/cdebconf/src/frontend.c:222 
(frontend_new): Cannot load frontend module 
/usr/lib/cdebconf/frontend/slang.so: No such file or directory.

This message is just repeated endlessly. Can anyone tell me what is 
going wrong here?

Cheers,
Jonathan