I've got the same probem.
i could install DBD-ODBC by downloading the files:
DBD-ODBC.ppd
DBD-ODBC-1.13.tar.gz
and editing the <CODEBASE HREF> in the ppd-file (its a xml-file)
finally executing: "ppm install <path>\DBD-ODBC.ppd"
Unpacking DBD-ODBC-1.13...done
Generating HTML for DBD-ODBC-1.13...done
Updating files in site area...done
8 files installed
and it works
I was receiving the same problem. Tried using Telnet to port 80 and figured that my system was blocking access to port 80 except for browser. I disabled 'on access scan' of my antivirus and was successful in connecting.