installing 3.3.5 error with php extension

[Fonsjnsn]

1: I had downloaded and copied ADODB5 into {root}/LetoDMS/adodb
2: I load {root}/LetoDMS/install/index.php in my browser
3: I pushed < start installation > at the start page
4: I get the a page with the error message. This is the {root}/LetoDMS/install/install.php page as I can see in my address field of the browser

my jpeg pictures aren't accepted to attach to this post. I try to convert them if necessary to post them here.

regards

Fons