Low final library

[molpath]

Hi everyone! I am brand new Ion Torrent user, and I tried to prepare a run for inherited disease panel. In the end, I got a very poor Final Library result,only 3% in which I see that most of the unusable reads were test fragments, 82%.Here is the screenshot.
[IMG]/Users/Riko/Desktop/5b37c3eba942a8df384012e4c200dd8d0b4a601f70d2e2296f707f1a11d8a234.0.jpg[/IMG]

Can You please tell me possible reasons for this?

[jon123]

Could you please tell me your i)amount and size distribution of input DNA for library preparation, ii)final library images by bioanalyzer, and iii)library kit.