Page doesn't load on browser

Hello:
I am building an app with DWMX, PHP 4.3.4, MySQL4.0.18 and Mac OSX 2.8.
When I try to open a "user registering" page trough a link from another page;
it doesn't load and after an unusual delay it loads blank, without any error
message or else and in the browser I see
"http://localhost/~eduardo/prueba/Booking/add_user_record.php". The same happen
with other pages.
Then when I load the page directly from DWMX it loads correctly and it sends
data to the DB. But on the browser the URL is:
"http://localhost/~eduardo/prueba/Booking/TMP4jnh2j784.php"

Thanks for your help