Works mostly fine here. Below is the output from your program (except that I snipped out the DBM and File driver results, and the @INC path from the error message.)

$ ./749992.pl
ExampleP
        dbi:ExampleP:dir=.
Gofer

ODBC
        dbi:ODBC:pci_PITS_1, dbi:ODBC:mrchact, dbi:ODBC:VisiWork, dbi:
+ODBC:Jigzup, dbi:ODBC:ATHENA, dbi:ODBC:BASE, dbi:ODBC:UniCRE, dbo:ODB
+C:DMap
Proxy
install_driver(Proxy) failed: Can't locate RPC/PlClient.pm in @INC (@I
+NC contains: <SNIP>) at /usr/lib/perl5/site_perl/5.10/i686-cygwin/DBD
+/Proxy.pm line 29.
BEGIN failed--compilation aborted at /usr/lib/perl5/site_perl/5.10/i68
+6-cygwin/DBD/Proxy.pm line 29.
Compilation failed in require at (eval 18) line 3.
Perhaps a module that DBD::Proxy requires hasn't been fully installed
 at ./749992.pl line 13
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