Error No module named 'TheNameOfMyModule' in GRC

[Michelle]

hello,

I created an OOT module, added a block and made the block available in 
GRC. Then I installed the module and called ldconfig (as I'm in ubuntu).
My block appears in GRC but when I insert the block in a graph and 
execute that graph I get an error *No module named 'TheNameOfMyModule'. *

Please can you enlighten me on how to fix this issue? I followed the 
instructions of the wiki 
https://wiki.gnuradio.org/index.php/OutOfTreeModules

Thank you.