Cannot build any of the architectures requested: any

Hello,
I have a problem using PPA :
I have made a package of "populations", a C++ software that compiles fine using cmake on my computer. the debuild or pbuild command works fine.
After the "dput" upload :
dput -f olivier-langella populations_1.2.30-1_source.changes
I receive this message from PPA :

------------------------------------------
Rejected:
Cannot build any of the architectures requested: any

Format: 1.8
Date: Wed, 24 Oct 2001 11:18:51 +0200
Source: populations
Binary: populations
Architecture: source
Version: 1.2.30-1
Distribution: jaunty
Urgency: low
Maintainer: Olivier Langella <email address hidden>
Changed-By: Olivier Langella <email address hidden>
Description:
 populations - population genetic software
Changes:
 populations (1.2.30-1) jaunty; urgency=low
 .
  * Initial release.
------------------------------------------
I have successfully built this package on different architectures "i386", "amd64" and "powerpc" with "debuild".

I have no clue to fix this problem ?
What should I test ? Is it a problem if I am using "cmake" to configure and compile ?

Thank you for any idea,
Olivier