Permission Denied during firmware upgrade

Hello,

I have a HP DL360p Gen8 server with a Smart Array P420i controller.

I'm getting a warning message in ESXi 5.0 under the hardware status of the array controller.

I'd like to upgrade the firmware of the controller and the instructions say to do the following steps.

1. Log into ESXi 5.0
2. Enable ESXi Shell
3. Enable  SSH
4. Restart the management agaents
5. Copy the firmware file (CP030321.scexe) to a temp direct
6. So i copied the file to the ESXi 5.0 host /tmp
7. Logged into the ESXi 5.0 host as root
8. cd /tmp
9. and typed ./Cp030321.scexe to run the file
10. But i get "Permission Denied"

Does anyone now why i would get permissioned denied message when i'm logged in as root?

Or maybe you know another way i can upgrade the firmware for the array controller.

Thanks