Crash when pasting refs into References 1.9 on Windows XP

I have the APA template open, with the horizontal split screen with Index cards open on the lower screen and References open in the top screen. I am trying to paste a formatted reference from EndNote X2 into the Reference page and have the cursor positioned at the left margin just below the heading, but the programme crashes when I attempt to paste.
Only other programmes open on the computer are EndNote, Firefox, Thunderbird and Scrivener, with AVG running in the background.
I’m just starting to use this programme - and think what I see is fabulous for writing my long-delayed PhD…!