[galaxy-user] Error during data upload of fastq.gz

hi, Maybe anybody can give me a hint for the following problem... When I try to upload a fastq.gz file into galxy using url function the input os canceled with the following exception: An error occurred running this job: The uploaded file contains inappropriate HTML content I don't know where to start to have a look at. The upload of all other fastq.gz files from the same run works smooth. best stefan PS. Yes I know, the problem is really unspecific, sorry for that...