I'm getting the same problem!
I've now been trying for 16 hours to get this to work (£700+ of my time wasted). I've followed this thread, but I have no joy whatsoever.
My record is being inserted correctly, but URL is being corrupted just as it has been mentioned in previous replies. I've downloaded the library file and placed it in the correct place, but still no joy.
I have now created the same files six times and can ill afford to do it yet again, so I really need some assistance with this, and quite urgently. I need tech support to log on to my computer and correct the issue. I'm right up against it here and will struggle to explain to my client why relatively simple hasn't been done.
I'm using CS5.5 and 2.0.8 of dataassist.
Does going back to 2.0.7 work? Can somebody let me know please?