[Android]Basic program not working

Hi, Can you tell me why this program wont compile?

http://shrani.najdi.si/?2L/C1/3bgE9f...m-2012-05-.png

The problem is "id"(red underline).

I can provide some additional print-screens if needed.

yesterday won't compile but today i compiled it and run it with no problem.(but i didn't changed one thing)
?

sometimes if i code has been created and typed with an id and using an ID referring to a specific code for that id. the application sometimes need to be refreshed to remove a problem and or saved