Is there a bit-bridged plug-in window open?

i don't know what 'bit bridge' is, 
so i do not know.
 

batsbrew
i don't know what 'bit bridge' is, 
so i do not know.
 

It a little sub program that allows 32bit plugins to work inside a 64bit OS/DAW. It basically "bridges" the older 32bit plugs to the 64bit environment and sometimes the weird little window that has certain controls pops up behind others and takes focus away from the DAW until you do whatever the hell it's crying about.
 
I've never had that happen myself and to me it sounds like a usual Sonar gremlin bit you in the butt (in this case maybe the driver connection to the keyboard got screwed up in that project and by yanking the cable you reconnected it all) but yeah... bit bridge (and there is another one called JBrridge that you gotta buy separately) is just a compatibility thing for old plugins.

i'm on 32 bit win xp

I figured you might be on a 32bit install. You obviously don't need to worry about such shenanigans.
 
Been meaning to fire up my old XP system to yank some files and tinker around with my old DAW with some of my new knowledge.
 
Cheers, bud. Glad you got it workin'.

YEP.
that's how mine looks now.
LOL

Most keyboards have mechanical switches, and as such are designed for a maximum number of "throws" before they fail. The spacebar is the most-used key on the unit, so that's the one most likely to go first.
 
30 years ago you paid a hundred bucks or more for a keyboard and they lasted forever. Nowadays, they're 10 bucks and stamped out by a machine and intended to last about as long as an iPhone model. 
 
When a microswitch starts to fail, it usually does so intermittently at first. It either sporadically refuses to transmit a keypress at all, or it transmits a dozen every time you press it. The spacebar often has two switches due to its width, so one may fail before they other, such that whether or not it works depends on which hand you hit it with.
 
Bottom line: you may just need a new keyboard. Got any old ones in the closet from retired computers? Sometimes an ancient keyboard is more reliable just because it was built to higher standards.

One other thought...if the switch begins to exhibit "bounce", which is to say signals multiple keypress codes when you only press it once, that can quickly fill your keyboard buffer. When that occurs, the keyboard appears to be non-responsive because the computer can't accept anymore keypresses.