I can’t comment

Hi,

i have a fresh wordpress installation with wpdiscuz and directories pro plugin from codecanyon. The plugin create a custom post type. I can see the comment field but i can’t comment. I become the message:

We are sorry, you are not allowed to comment more than one time!

If i have disabled wpdiscuz i can comment with wordpress comment funcion. I have try it logged in and as guest it’s the same problem.

can you help me to solve this problem

best regards
hasel