Hey man,
I was having the same problem. I must admit I do not know very much about Worldbuilder, modifications, or computer programming; however, what I do know is that when I downloaded the patch for C&C 3 (v 1.9) from C&C Labs
here it worked just fine. I must also admit that it may not work, but this is what I did.
I hope it worked and thank-you for your time. Have a nice day.