I currently have a website that I am trying to secure with digital certificates. That function works correctly, the brower supplies the cert and then redirect the brower to the site, works perfectly. My problem lies with when I try to install a personal certificate on a Samsung Blackjack with windows mobile 5.0 device. I transfer the cert to the phone and run it, it asks me to install it, i click yes. I get no confirming message or anything of that nature, it returns to the file explorer. When I go the site via the phone, the internet browser ask for the cert I am using. My question is how do I get IE mobile to use the required cert to access the webpage? The certs are correct and they have been tested on other devices ( computers) my problem lies with the phone and the secuirty that is preventing this. I have heard that a .cab file will install it correctly but I do not know how to write one, help on that would be great as well.