I am using the Craft Pro trial version and I want to use S3 for my Assets. However, I enter my credentials but the refresh button does not show my bucket. Also, when I try the refresh with wrong credentials it shows the error message but with correct it just doesn't show anything. I tried to connect to by bucket with other tools and was successful so this is why am thinking that is a restriction on the trial version of Pro.
So is it a Craft trial issue? Are you allowed to connect to S3 in trial version of Craft Pro?