Eclipse error in project, but i can't find it

While Developing an "hello world" app for my brand new htc desire, i found something strange.

I can't execute my programm, it says: "You can't do that with an error in your code" or something ;)

i know eclipse. normally eclipse sho开发者_开发技巧w me where the error is, in which file exactly, but if i look to the project browser, i get that image: http://img404.imageshack.us/i/unbenanntdpe.png/

and i just developed in 2 files: http://pastebin.com/KfU2fH98

the error happend all off a sudden, can someone figure out what this mean?

thank you!

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try cleaning it

Project -> Clean

then see if that works, has solved many of my problems