so, i got this strange error,
 Autodetecting java
Testing default folder
Checking C:\Programfiler\Java\jre6 folder
Found java in C:\Programfiler\Java\jre6 folder
Starting java from "C:\Programfiler\Java\jre6\bin\java.exe"
Error downloading latest JAR version: java.io.FileNotFoundException: lib\minecra
ft.jar (no acces)

And i don't know what it is and i've never seen anybody else have this problem, can u help me?