Page Navigation Not Working

We’re on the final touches of developing a WordPress site however are struggling with an issue that our developer can not resolve.

The strange thing is our blog page navigation seems to be working fine to go navigate through older articles, etc. (bottom of page – Older Entries link) > http://new.true-surface.com/blog/

However we setup a separate section for “Tradeshows” and it for some reason is not working. (bottom of page – Next link > http://new.true-surface.com/tradeshows/

Does anyone have any ideas? We would really appreciate your support.

Thank you very much!

Carlos