[Dx4win] 2 radios LPT interface

[Kostas SV1DPI]

I am trying to control 2 radios with dx4win (and writelog also but this is 
an other story). If i have understand ok my setup must be something like 
this
com1 controls radio1
com2 controls radio2
com 3 does ptt and cw in both radios. i will choose radio 1 or radio2 using 
lpt port (? is there any other way ?)
If i have understand it ok, LPT port's pin 14 changes the focus between 
radio 1 and 2

I measure voltage between pin14 and pin18 of lpt. I have 4,5 volts.
I made a small interface like this 
http://www.qsl.net/wy3a/Writelog_CW_AB.htm
and i was believing that when i change radios i will get a click on the 
relay. Unfortunately nothing is happened.  I checked voltage and it is 
steady at 4,5 volts. I think that when i am in radio1 must get x volts in 
pin14 and when i go to the second radio i 'll get y volts. What is my 
fault??

73 Kostas sv1dpi