help with hanging notes in studio instrument

hi guys, i have been reading allot online on this problem but i never found an answer that works. also most people described their problem a bit differently than what is happening to me so here it goes:
 
i use cubase 5. i am using the studio instruments vst.
i have been using this product with this daw for a few years now. i used it on many songs i recorded and everything worked fine.
for some reason the other day i pressed the play button of my cubase daw and the vst played the notes without ever stopping them so as you can imagine all the notes were played together as a big mess.
i read in many places that the problem is that the daw does not send the note off to the vst. well 2 things: 1 - it does not seem to be the case as i see the little light (a cubase feature) turn red at note on and a few sec later (i am guessing it is the note off) but the note keeps on playing (until i press the stop button on the vst it self) 2- if this is a case of note off, how the hell do i fix this in cubase 5? i really like this vst and i don't know what to do anymore.
i tried re installing the daw, i tried re installing the vst, i tried re installing both. i tried deleting newer software from the computer that might be clashing with this vst. i really do not know what to do anymore.
your help ASAP would be greatly appreciated.

hi. well i am not the same person...
to be honest this . is not exactlly what my problem is because i am not using and patterns that come with the vst.. i am playing my own notes.
this is really weird. i just installed cubase and the vst on a never before used computer (i mean this computer never had these programs in it) and it is running windows xp (just in case) and the same issue happens. it is driving me nuts... i did use this plugin a few weeks ago without any problem.

Make sure you don't have a stray sustain on cc in your midi clip. That will cause exactly what you're dealing with.

This is a user forum. In 2015, the advice to contact Cakewalk support was a good one. Unfortunately the OP never returned to report what support had to say (assuming they were contacted)