I need help please....

So here's what's going on...I'm trying to get files off a laptop hd which has
a broken screen to another laptop...

I've talked to a few people and they recommended me to take the hd out of
the broken laptop and put it into a external enclosure. I have gone that far
and have hooked it up with my new laptop.

Here's where the fun starts... I keep getting a message "access denied" or
you "need permission from the administrator." I am the administrator and I
know the password to the old laptop, however I have no idea how to get my
files off of the hd.

I need help I've tried everything in my power...

Max