[opensuse-buildservice] failed to add patch

Hi! I am currently trying out the buildservice and I want to add a pci id to kernel module. So I linked to kernel-source in my home: project and added a patch, see http://build.opensuse.org/package/show?package=kernel-source&project=home%3Apirast But the build service says could not add patch 'a9rp-wlan-support.patch' Does anyone have an idea what causes this? Thanks! Martin