m_a_r_t_i_n's dashboard

When i try to assembly my project with my own assembly.xml file which is situated in the src/main/resources/assemblies I got always the error:
Error reading assemblies: Descriptor with ID 'XY' not found
I've no idea what I'm doing wrong. I tried only the ID or the complete path in the pom.xml of my project.
Thanks for any help.
Martin