sabnzbd

I am running sab and sickbeard on a raspberry pi and my laptop as a backup if there are several tv shows to down load the raspberry does not get all the repair blocks, when i run sabnzbd on the laptop and add the nzb files to the queue manually the download and repair work flawlessly the settings for the search are the same except as i said I add the file to the laptop manually if I add the file manually to the sabnzbd on the raspberry the repair fails due to missing blocks
I use the same site for both nzb files

any ideas as to why the raspberry which downloads over night using sickbeard is failing to get the repair blocks