Problem with TERMCAP in Xfree86

["Brown, Paul, BROWNPA2" <brownpa2@btlip25.bt.co.uk>]

Hi,

I've got Debian GNU/Linux 1.2 installed and working and
have installed XFree86.  It is working fine except for
when it comes to displaying an xterm it says that is
cannot find a usable TERMCAP entry.  What does this mean
and how can I fix it ?  I'm currently stuck with using
640x480 resolution because my SVGA monitor is knackered
and I'm having to use an old VGA monitor, is this part
of the problem ?

Many thanks in advance,

Paul Brown