Well, not to ask a silly question...
I have no idea what PEAR is, but if it uses Microsoft's ADODB, then I assume this is intended for a Windows server, yes?
And if that is so, then have you installed MyODBC to connect MySQL to ADODB?
An optimist sees the glass as half full.
A pessimist sees the glass as half empty.
A realist drinks it no matter how much there is.