[help] Move prestashop from webhost to localhost

[dammionx]

When i try to move my prestashop website from

 

sub.mydomains.com --- that locate in my webhost = public_html/sub/

 

to localhost --> 127.0.0.1/sub/

 

i get this error message

 

Server error!
The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there was an error in a CGI script.
If you think this is a server error, please contact the webmaster.
Error 500
127.0.0.1
12/20/11 10:24:53
Apache/2.2.21 (Win32) mod_ssl/2.2.21 OpenSSL/1.0.0e PHP/5.3.8 mod_perl/2.0.4 Perl/v5.10.1

 

What must i do?? please help me..

[dammionx]

when i try to access http://127.0.0.1/sub/admincp/

 

it returns blank page..

[El Patron]

what version of PS are you using?