Alternatively, have you tried these instructions to import the ris file into endnote web?
Importing using RIS
Most databases offer an export in a tagged format called RIS. This may also be called Bibliographic Software format, EndNote format or something similar.
- Search and mark/select the records you would like to import.
- Go to the marked/selected records section for the database.
- Select “Save” and save the file in the RIS (.ris) format.
- Go to EndNote Web.
- Go to Collect → Import References
- Browse to where you saved the file.
- Select RefMan RIS as the import option. You can also choose a destination folder.
- Click Import.