CCAvenue integration in Zencart

I have a zencart installation with CCAvenue payment gateway. However, recently, website has started giving problems like - a) Payment being received but orders not being generated - I have to ask the customers individually what they ordered. b) Unable to see order details even for older orders. The problem lies with the CCAvenue payment module which is available for download on the Zencart site - many others are facing this problem. Project winner will be chosen immediately when I find a suitable bidder who can resolve this problem.