Why can't I update my Drupal modules and themes? Suddenly I found my self in a big issue: I just can't upadate my Drupal modules and themes.

When I run the update script via the GUI, the download phase passes correctley (or it seems to be). But when I perform the database update and I click to "Continue" and putting the site under maintennace mode, nothing happens. And also a major problem come: the maintenance mode persist even when I disable it.

To resolve that issue I clear all the cache from the database.

Any idea or help for that?
1) try to run the updates via drush

2)are you sure that the new module version has a new hook_update_N in it? If not then there will be nothing happening during the update in GUI