Probably you solved your problem till now, but who nows.(posted 8073 days ago)I managed to capture image in Adobe Premiere via Hercules DV Action! without any problem, using Adobe Premiere version 6 (I believe is the only one designed for DV capture and editing) and Sony DSR 20P. Windows XP as operating system.
Your problem might be: - the wrong version of Adobe Premiere (try unintalling and reinstalling the aplication if it already is version 6) - incompatibility between Premiere and DV camcorder/deck. Check the adobe site for official compatibility list.
My guess would be you are using an older version of Premiere. Hope this would help.