Error during attaching operations and attachment downloading

Hi,

I've some problems attaching files to new mails. These are the errors:

1. When I attach a single file of size >1MB after few second, roundcube

return on compose mail but there is no file attached;

2. When I try to attach multiple files, and the total size of the

attachments are greater than 1MB, the roundcube interface freeze, and I've to reload manually the page. Once I've reloaded I'm in front of the "Compose New Mail" interface, without any entry I've already done.

3. When I receive a mail with a file as attachment and I try to open it

with left-click, the type of the file is correctly recognized, but the application loaded by the browser cannot find the file. If I right-click -> Save as... on the file, I can correctly save this on the disk.

Thanx for your help.