Bad Error in BIDS

Dear All,
Sorry, if this post is in the wrong section (i don't know where to put it), so i put the question in the General DBA Section...
Today, when I'm changing some part in my package and executing it manually in BIDS, suddenly there is an error which says like this:
"Cannot communicate with the debug host process. Failed to obtain child process active object."
After the error, I try to create a new package in a project, even i create a new project...but the error always show up...
Now, I can't debug any package...at all
Please help me guys, because i don't find the solution until now...
If any of u has faced the same problem like...please ur advice and suggestion guys...
Thx,
Ady

Even when I try to create the same package in the new project...i can't debug it...i can't running it...the same error message always show up....