i can't upload the programme it schow me this msg
Lots of people have had issues with the IDE's over 1.6.5 R5 and under 1.6.9.
May I suggest that you upgrade to 1.6.9 or try the Zipped version (unzip to folder and run from a shortcut) 1.6.5 and see how you get on.
Also avoid 1.6.10 for the moment too.
Additionally it may be helpful to add any extra information you may have such as OS and what is connected to the board and how etc.
There are some fantastic people on here who given the right information can often spot an issue with enough information.