(1) Explain your problem, don't simply post "This isn't working". What were you doing when you faced the problem? What have you tried to resolve - did you look for a solution using "Search" ? Has it happened just once or several times?
(2) It's also good to get feedback when a solution is found, return to the original post to explain how it was resolved so that more people can also use the results.
If you end up needing to work between MSP and P6, I highly recommend looking into a tool called XER Transfer. As we know, there are many issues in exchanging between the two, but this tool will save you hours, and will pay for itself in the time saving alone.