Firefox 4.01 and Direct export

When using Firefox 4.01, I’ve tried downloading from Historical Abstracts on the EBSCO Platform and instead of inserting the references directly into the library I have open, it prompts me to open another library.  Has anybody else encountered this problem and how did you solve it?

It was no problem with the older versions of Firefox

I’m running Windows 7 64 bit and Endnote X4.  The ResearchSoft Export Helper is installed on the PC.  

Any help would be gratefully appreciated