You shouldn't post login and password information on the forum, as it is public, even for a test installation.
I tested your install and on Firefox it's returning a zero sized reply, which used to be caused by PHP's memory_limit setting being too low.
You should have at least 64M set, as well as larger amounts for other limits (post_max_size, timeouts, etc).
There is plenty of info on PKP's Wiki
as well as this forum.
Ramón Martins Sodoma da Fonseca
Analista em C&T
Coordenação de Tecnologias de Informação
Instituto Brasileiro de Informação em Ciência e Tecnologia - IBICT
Ministério da Ciência e Tecnologia - MCT