Page Blank after plugin installation on moodle 2.6

Hello. I've to connect a joomla 2.5.19 web site with moodle. I've just installed moodle 2.6, then the plugin joomdle. Once I have installed it, I get redirected to the page notification...but it is empty. The page mysite.com/admin ... always shows me a blank page with this tilte "plugin check". The others pages (like mysite/admin/plugin.php) work perfectly, so I has been able to set up plugin, web service, users, protocol and everything the system needs to be integrated with joomla.... result: everytime I try to connect to the admin page, it appears blank.
The problem goes worse on Joomla. When I try to connect a joomla voice menu to moodle wrapper, the joomla set up voice menu page loses the layout as soon as I define it as any moodle link (I'll upload a screenshots wrong/right page)
Can you help me?

A blank page usually means a PHP error. Check your logs to try to get more info.

As for Joomla side: I never was that behaviour. Are you sure you installed it correctly? You may try re-installing....

The memory_limit was 128M...now is 512M and joomdle works perfectly. After I solved the blank page problem, moodle completed the plug in installation, so now I can add the joomdle function to the user and get a workly token.
Than you