Why is my mac dashboard not working?

I have loads of posties, and only one of them is showing whats written on it, as well as theyre all yellow when I changed the colors. My clock is missing both hands, the weather empty and so is my calendar, dictionary and unit converter. My calculator is also frozen ... WHAT DO I DO???? Can I fix it somehow or is all the info i had on it gone????Why is my mac dashboard not working?
here is the support site http://www.apple.com/support/ they should help...

help blackheads