[galaxy-user] Why don't we get FPKMs from this gene?

Hello, We are using BAM to map Illumina reads to a bacterial genome, followed by Cufflinks o get the FPKMs. We have come across many genes for which we get FPKM=0 (using both gene and transcript expression) even though there are reads mapping to these gene IDs (e.g. the region between the dashed lines in the attached screenshot). Can anyone suggest a reason/fix for this? Thanks Dikla