[Dxbase] CW interface--was working, now isn't

[kn4qs at charter.net]

Repost after receiving no replies to first query...
After having great success using the internal CW keyer feature in DXbase
2004/5, all of a sudden it refuses to work at all. My setup is radio 1 on
com1 and radio 2 on com4 with the CW running on com1. When I upgraded to
2005, it worked after running the driver setup. Since the problem started, I
have run the dxbdvr program 20 times or more and it still does not solve the
problem. I have checked port addresses and amended com3's address to match
the PCMIA modem that uses that port, just in case that was an issue. No joy.
I have an RS232 analyzer in line and I'm sure that the software is not
toggling the line. Also, I get a key down condition when the computer is
booting up as the comport inits, so I know that I have connectivty and the
keying circuit is working. So I'm left with an unexplained software driver
glitch that is really starting to irritate. I retreated to the 2004 version
and it too has the problem. I used N1MM logger over the weekend and its
handling of the CW function was perfect. The only thing I have done to my
computer recently that might affect ports is that I have a) added a wireless
PCMIA card (which did not affect anything at the time I added it) and b) I
pulled out the PCMIA modem for a couple of days and replaced it. I noticed
the problem not long after that, but I'm not sure it was coincidental.
Anybody got any bright ideas? Randy Galloway KN4QS