Make sure that the Wimba URL provided by your instructor is set as a trusted site and that your pop-up blocker has been disabled for this site. You may need to run the Wimba Setup Wizard and download the latest version of Java.
For assistance with Wimba, you can check the Wimba FAQs, visit the Student Computing Help Center in Barnard or call 704-687-6400. You can also submit this problem to the HelpDesk Online and track the status. When the Help Center is closed, you can get Wimba Support at 866-350-4978 or email technicalsupport@wimba.com.