python program deleted

[jim-on-linux]

py users,

I developed a python program and used py2exe 
to create the exe. 

I zip the entire package and email it to my 
clients.

Some clients get the zip file, unzip the 
package and everything works fine. 

And some clients get my email with an icon 
attached which has the correct filename but 
the size is 8k when it should be about 5 mb. 

I've renamed the file without the zip ext. 
and tried other renaming schemes without 
success.

Has anyone had this experience?  Any ideas on 
how to solve this problem.

jim-on-linux