Missing midi ports

Hello Ya,all............
 
i'm using Sonar X3 and Sonar producer edition, since 2 weeks , when i wanna open a project , i get the dropbox : 

reassign midi ports , for you Dr rhythm Boss 880 , and sometimes he can't find reverb or other FX,  
and then my computer blocks.............the only thing i can do is restart
who can help me

sorry for the bad english

Be sure you have all your gear turned on before you start Sonar. Give them a moment to load any drivers too. 

Anderton
...Bearing in mind that sometimes your computer won't recognize a piece of gear unless it's turned on after the computer has booted, and then it can load so Sonar can recognize it.

What I mean is simpler than that though what you say is useful.  Sonar can't see a device if its turned on after Sonar is loaded. All my audio gear is turned on by a single switch. Makes it a lot easier if you have more than one piece of external gear.