我被这个引用困了好久，bib 里的所有引用突然都失效了，tex make 告诉我在我的 bib 里找不到。
我的主要 tex 文件如下：
\documentclass[GBK, colorlinks, notocbibind]{pkuthss}
\usepackage[backend = biber, style = caspervector, gbk]{biblatex}
\usepackage{lmodern}
\usepackage{amssymb}
\usepackage{fancyvrb}
\usepackage{hologo}
\newcommand{\myemph}[1]{\emph{\textcolor{red}{#1}}}
\newcommand{\docversion}{v1.4 beta1}
\addbibresource{pkuthss.bib}
\begin{document}
\frontmatter
\maketitle
\include{chap/copyright}
\include{chap/abstract}
\tableofcontents
\mainmatter
\include{chap/introduction}
\include{chap/chap1}
\include{chap/chap2}
\include{chap/chap3}
\include{chap/conclusion}
\appendix
\printbibliography[heading = bibintoc]
\backmatter
\include{chap/acknowledge}
\include{chap/originauth}
\end{document}
我的围兜在这里：
@online{biber,
author = {Kime, Philip and Charette, Fran\c{c}ois},
title = {Biber: A backend bibliography processor for biblatex (Version 0.9.9)},
type = {M/OL},
date = {2012-03-29},
url = {http://biblatex-biber.sourceforge.net},
}
@online{biblatex,
author = {Lehman, Philipp},
title = {The biblatex Package: Programmable Bibliographies and Citations (Version 1.7)},
type = {M/OL},
date = {2011-11-13},
url = {http://sourceforge.net/projects/biblatex/},
}
@online{biblatex-caspervector,
author = {Vector, Casper Ti.},
title = {biblatex 参考文献和引用样式：caspervector v0.1.3},
type = {M/OL},
date = {2012-05-31},
url = {http://caspervector.googlecode.com/files/biblatex-caspervector-0.1.3.zip},
userf = {zh},
}
@online{ctex,
author = {{ctex.org}},
title = {ctex 宏包说明（v1.02c）},
type = {M/OL},
date = {2011-03-11},
url = {http://www.ctex.org/PackageCTeX/files.xml?action=download&file=ctex.pdf},
userf = {zh},
}
我的 tex 出了什么问题？有人能给我一些建议吗？非常感谢。