So there are some JPG files I can view and some I can't, and I can't seem to open any WAV attachments. I am using an 8800 with 4.5.0.55. I have searched for an answer, and I have verified that the Attachment Service is installed on the device. Any ideas?

I guess my real question is, what are the criteria for opening attachments? File size? File type? I've already verified that these files should open.

Thanks in advance.