update to template caused module error

I did the update to com virtue mart today so that you could register users. now I get an error on one of the spots where i am using the mod news pro gk4. this didn't happen until i did the update.
Warning: imagesx(): supplied argument is not a valid Image resource in /home/pjlady/public_html/modules/mod_news_pro_gk4/gk_classes/gk.thumbs.php on line 190

Hi

Please try update the module also. What VM version is that ?