based on what i saw on google's search results,its quite likely that dbd::mysql had some problems while being installed. try uninstalling the modules you mentioned and installing them again
here's a link to the download page :
Download
then untar/gz it and do:
Tar zxvf Msql-Mysql-modules-1.2219.tar.gz
Cd \Msql-Mysql-modules-1.2219
perl Makefile.PL
make
make install