LaTeX and BibTeX Compiling Error

LaTeX and BibTeX Compiling Error

I have my Reference.bib file and my LaTeX file which I want to compile
together to get a citation.
I've done
latex file
bibtex file
latex file
latex file
But what I get is the output (?, ?)
There's a citation which I got correct when I was testing just now. And I
try to compile all citation at once. Is it a problem?
Here's my sample of citation code
\cite{5643778}
And my sample of a reference at Reference.bib file:
@INPROCEEDINGS{5643778,
author={Haiping Wang},
booktitle={Computational Intelligence and Natural Computing Proceedings
(CINC), 2010 Second International Conference on},
title={Review of studies on online consumer trust},
year={2010},
volume={2},
pages={97-100},
keywords={Web sites;consumer behaviour;electronic commerce;security of
data;Website;calculative based trust;cognition based
trust;e-commerce;institution based trust;knowledge based trust;online
consumer trust;personality based trust;Biological system modeling;Book
reviews;Buildings;Business;Electronic commerce;Internet;Knowledge based
systems},
doi={10.1109/CINC.2010.5643778},}