Attachments in messaging problem

[DjKringe]

Hi all...aside from the crappy battery l;ife I love the Touch Pro. Today though, I sent a .cab file from my pc at work via gmail to my gmail account I use on my phone. When I go to open the attachment on the phone it gives me an error saying I cannot open the file because it is potentially harmful. Is there a security setting I can change to stop it from doing this?
Thanks a ton