[Cadence NCVHDL] Generate several libraries and use them

Hello,

Still not getting the hang of this so asking you guys:

I have several files in a project which I have compiled in different libraries. (Using Cadence IUS). My problem is that if I do :

lib my_lib1;
use my_lib1.my_entity_from_lib1;

in a file which will be compiled in my_lib2... it isn't recognized, so I have to make the 'component' declaration in the architecture... If the library call was recognized, I wouldn't need to re-declare the component...

What am I doing wrong?. Do I have to regroup alllibraries in one final one ? Do I have to place them in a ceratin folder? My organization is:

folders:
hdl
sim (where I have the cds.lib and hdl.var and compile my different libs in differnet folders my_libx.lib)
par
synth

etc....

Could you please give me a simple exmaple of how you would organize a roject with several libs?

Thanks in advance (i tried googling or books but i seem to only find simle answers...)

Bye,
T