memcached monitoring script

Hello all,

I'm using your script for some weeks now but no graph displays. I simply follow your directives (add a line in hobbitserver.cfg, add a graph definition into hobbitgraph.cfg) and as a result I have a simple line "hobbit graph ncv:mcache" with a magnifier near it. The rrd database is filling up and looks good :

<!-- Round Robin Database Dump --><rrd> <version> 0003 </version>
        <step> 300 </step> <!-- Seconds -->
        <lastupdate> 1252575866 </lastupdate> <!-- 2009-09-10 11:44:26 CEST -->

        <ds>
                <name> reqs </name>
                <type> DERIVE </type>
                <minimal_heartbeat> 600 </minimal_heartbeat>
                <min> NaN </min>
                <max> NaN </max>

                <!-- PDP Status -->
                <last_ds> 1174372 </last_ds>
                <value> 1.1526666667e+03 </value>
                <unknown_sec> 0 </unknown_sec>
        </ds>

        <ds>
                <name> hitratio </name>
                <type> GAUGE </type>
                <minimal_heartbeat> 600 </minimal_heartbeat>
                <min> NaN </min>
                <max> NaN </max>

                <!-- PDP Status -->
                <last_ds> UNKN </last_ds>
                <value> 1.9418000000e+04 </value>
                <unknown_sec> 0 </unknown_sec>
        </ds>

        <ds>
                <name> conn </name>
                <type> GAUGE </type>
                <minimal_heartbeat> 600 </minimal_heartbeat>
                <min> NaN </min>
                <max> NaN </max>

                <!-- PDP Status -->
                <last_ds> UNKN </last_ds>
                <value> 1.3300000000e+03 </value>
                <unknown_sec> 0 </unknown_sec>
        </ds>

        <ds>
                <name> storage </name>
                <type> GAUGE </type>
                <minimal_heartbeat> 600 </minimal_heartbeat>
                <min> NaN </min>
                <max> NaN </max>

                <!-- PDP Status -->
                <last_ds> UNKN </last_ds>
                <value> 5.3200000000e+02 </value>
                <unknown_sec> 0 </unknown_sec>
        </ds>


Everything seems fine but no graph is showing up. Please help ! Thanks.
Sincerly,

ThomaS