Error starting electrum server

Hi guys...I'm trying to starting electrum server on CentOS 6.4 after its installation.

However I'm encountered an error when I launch the command "electrum-server" on putty:

Code:

Traceback (most recent call last):
  File "/home/bitcoin/bin/electrum-server", line 146, in <module>
    from backends.bitcoind import BlockchainProcessor
  File "/home/bitcoin/src/electrum/server/backends/bitcoind/__init__.py", line 1, in <module>
    from blockchain_processor import BlockchainProcessor
  File "/home/bitcoin/src/electrum/server/backends/bitcoind/blockchain_processor.py", line 4, in <module>
    import leveldb
ImportError: No module named leveldb

How can I fix this?

Just try to install leveldb module with commands "yum install python-leveldb" and "yum install py-leveldb" but always with the same error, like this: "No package python-leveldb available, nothing to do."

Any suggest will be much appreciate.
Thank you! Cheesy