[TYPO3-dev] How to copy typo3 folder into other workspace

[rayuth]

Hi all

When I copy my typo3 folder and export typo3 database from my old pc 
into other one, (I install dummy and source package) I got some error on 
page:
You don't have permission to access /typo3/ on this server.

I try to give permission but nothing change, I still got same error.
So I try to make new link of typo3_src but I still got same error.

Did I miss something to do? What is the problem?

Thanks,
Yuth