[galaxy-dev] samtools in local instance of galaxy

i have installed local instance of galaxy and have a small problem with samtools. when i try to convert sam file to bam, the result pane shows that the job is running (for several hours). but when check the galaxy log file, it shows that the job is finished normally. i can also find the result (bam) file in galaxy/database/files/000/ folder. can anyone help to resolve this issue. Thanks Praveen