Every thing is working ok says the perl debugger:
Checking //usr/local/etc/httpd/cgi-bin/proveedores/db.cgi for common errors:

Existance check...
File Exists.
Checking for zero size...
File size is OK.
Checking permissions...
File is executable.
Checking for ASCII format...
File is an ascii file.

Checking Syntax...
Syntax is OK!

But, it returns on the browser internal server error, ????????¡¡