[support] problems installing modules

[Jonathan]

Hi all. so, I have the new drupal update, which is 7.27 and the way I 
use to install modules is I use to goto my modules area in my admin 
panel on drupal and click the install modules link, then I would go to 
either upload a module or enter URL, in which case  I have tried both. 
well, when I click install, nothing happens it just takes me back to the 
previous screen! and when and if I try to click the install button for 
the second time, it just brings up a black screen. in short, it doesn't 
even take me to the ftp settings for installing the modules any more... 
does anyone knows why this is happening? Thanks.