Submit button CSS styling seems overridden

Hi Mike, I love the form and I am in the middle of configurng it. It’s really nice to be able to customise it so easily.

I have noticed that for some reason, the submit button doesn’t get styled completely, as if it were overriden.

1- I have tried in line CSS, background color does not show for example, whereas padding cursor are good.
2- I have tried to use a button class from the them I use and again, I only get partial styling.
3- I haven’t tried to remove plugins to see if there’s a conflict.

Any idea about what might cause this?

The theme I use is called discover, it’s the current version.

Thanks / regards, Greg

http://wordpress.org/extend/plugins/si-contact-form/