Won't start on PinguyOS 14.04 x64 (Ubuntu)

[Lopo]

musictube: /usr/lib/x86_64-linux-gnu/libstdc++.so.6: version `GLIBCXX_3.4.21′ not found (required by musictube)

lscpu output
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 4
On-line CPU(s) list: 0-3
Thread(s) per core: 2
Core(s) per socket: 2
Socket(s): 1
NUMA node(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 69
Stepping: 1
CPU MHz: 2000.000
BogoMIPS: 5187.69
Virtualization: VT-x
L1d cache: 32K
L1i cache: 32K
L2 cache: 256K
L3 cache: 4096K
NUMA node0 CPU(s): 0-3

[Lopo]

/usr/lib/i386-linux-gnu/libstdc++.so.6 -> /usr/lib/i386-linux-gnu/libstdc++.so.6.0.19
/usr/lib/x86_64-linux-gnu/libstdc++.so.6 -> /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.19

[Lopo]

strings /usr/lib/i386-linux-gnu/libstdc++.so.6 | grep LIBCXX
GLIBCXX_3.4
GLIBCXX_3.4.1
GLIBCXX_3.4.2
GLIBCXX_3.4.3
GLIBCXX_3.4.4
GLIBCXX_3.4.5
GLIBCXX_3.4.6
GLIBCXX_3.4.7
GLIBCXX_3.4.8
GLIBCXX_3.4.9
GLIBCXX_3.4.10
GLIBCXX_3.4.11
GLIBCXX_3.4.12
GLIBCXX_3.4.13
GLIBCXX_3.4.14
GLIBCXX_3.4.15
GLIBCXX_3.4.16
GLIBCXX_3.4.17
GLIBCXX_3.4.18
GLIBCXX_3.4.19
GLIBCXX_DEBUG_MESSAGE_LENGTH

[Lopo]

When trying to upgrade libstdc++.so.6 apt returns I have the last version installed :\

[Lopo]

When I try to update it APT returns that I have the last version installed :\

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