outputting a file from web-database for import to EndNote using existing filter

I’m a web developer working on making my site’s resources available for download in a format compatable with one of the existing filters in EndNote X1.  I’ve created a script to generate the output, but when I import it into EndNote, no records are created.  I’m assuming something in the input file is incompatable with the filter my client has requested me to use, but I don’t see a way to access any error messages which import is (I hope) generating.  Does the import process generate any error messages that could help me track down the problem?  If so, where would I find those?

Thank you,