install debug's symbol button

when kdenlive crash i have opportunity to send a bug report but the assistant window suggest to install the debug's symbol.
I try to install it with relative button but a new windows that appears is closed at the same instant.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: kdenlive 0.9.6-5ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-55.92-generic 3.13.11-ckt20
Uname: Linux 3.13.0-55-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.11
Architecture: amd64
CurrentDesktop: Unity
Date: Wed Jun 17 14:14:02 2015
InstallationDate: Installed on 2014-04-26 (416 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
ProcEnviron:
 LANGUAGE=it
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=it_IT.UTF-8
 SHELL=/bin/bash
SourcePackage: kdenlive
UpgradeStatus: No upgrade log present (probably fresh install)