unable to download .dss files with a yahoo account


New Email
I am a medical transcriptionist. I receive my work via Yahoo email as a download attachment. I receive work from 2 different offices.

Recently, I am unable to download one office's work. The other office works fine. I can open the letter and the download is there. When I click the download button, nothing happens.

I can take this same email and email it back to myself and then I can download it. It is a .dss file.

I use Safari and Firefox. Both have the same problem.

Please help me. I do up to 100 downloads from this office a week. I do not want to take the extra time to do this job.