[Elecraft] k3, HRD, and signaLink USB problem

[buddy s]

haven't updated k3 firmware
haven't updated HRD software
haven't updated windows xp software

been using hrd with signalink and k3 for months, until 2 days ago.  i
rebooted pc, to no avail.

in CW mode PTT on sihnalink does not come on when transmit initiated, nor
does light on k3

in psk mode, PTT on signalink does not come on, but transmit light on k3
does, no power from radio

in rtty mode, same symptoms as psk

any ideas/suggestions would be appreciated

thanks, es 73 de
w3bs, buddy