This is meant for new members of this forum. Welcome!
When posting a question please incorporate this information in your post. The more information you include the better your chances of getting the help you need.
1. SONAR version. This should include whether it is the Producer Edition or the Studio Edition. It is very important to also include what version number as well i.e. Ver 1.00 or Ver. 6.2.1. Without this information we will have to ask you what you are using. This will delay an answer to your question. Edited to add with the X series and the new Sonar 2015 be sure to note Artist Professional or Platinum. Also be sure to mention whether you are using 32 bits or 64 bits version of an OS and program.
2. Audio gear. List any and all audio cards or audio interfaces you are using. Include driver version too.
3. MIDI gear. List all pertinent MIDI interfaces you have in your system. The brand and drivers also. Any outboard MIDI gear may be useful as well to include in your post.
4. System specifications. Processor, memory, hard drives.The operating system with any service packs should be noted.
5. Judgment will help you to decide just how detailed you are in giving your specs. But more information is better then not enough.
6. What you include will of course be dictated by the type of question.
7. This forum is very active consequently if you stick around an answer will be soon forth coming.