Problem with checkout

[Khoem Sokhem <khoemsokhem khmeros info>]

Hello All list members,

I tried to checkout gimp from the respository but I got problem with 
"Permission Denied (publickey)". And I try to the instruction in page: 
http://live.gnome.org/TranslationProject/GitHowTo
But the problem is still exist.

Could anyone has problem like this?
Please give some glue.

Thank in advance for your reply.

Regards,
Sokhem