build error

[李向彬]

1 this is my first time compile the code , i got the error as below:
CertpathTesttestValidator_canGrokCriticalExtensionErrorCertificate
validation failurehow could i solve this?
2 i also tried this ant compile_gwt command , but got the Target
"compile_gwt" does not exist in the project "waveinabox".  anyone kowns why?