Im trying to use the mailbox processor service and am getting the following error. Any ideas?

System.Web.Services.Protocols.SoapHeaderException: Server unavailable, please try later ---> System.Configuration.ConfigurationException: WSE032: There was an error loading the microsoft.web.services2 configuration section. ---> System.Configuration.ConfigurationException: WSE041: Type CounterSoft.GeminiBiz.GeminiUsernameTokenManager does not implement Microsoft.Web.Services2.Security.Tokens.ISecurityTokenManager.
   at System.Web.Configuration.HttpConfigurationRecord.Evaluate(String configKey, SectionRecord section)
   at System.Web.Configuration.HttpConfigurationRecord.GetConfig(String configKey, Boolean cacheResult)
   at System.Web.Configuration.HttpConfigurationRecord.GetConfig(String configKey, Boolean cacheResult)
   at System.Web.Configuration.HttpConfigurationRecord.GetConfig(String configKey, Boolean cacheResult)
   at System.Web.HttpContext.GetConfig(String name)
   at System.Web.Configuration.HttpConfigurationSystemBase.System.Configuration.IConfigurationSystem.GetConfig(String configKey)
   at System.Configuration.ConfigurationSettings.GetConfig(String sectionName)
   at Microsoft.Web.Services2.Configuration.WebServicesConfiguration.Initialize()
   --- End of inner exception stack trace ---
   at Microsoft.Web.Services2.Configuration.WebServicesConfiguration.Initialize()
   at Microsoft.Web.Services2.WebServicesExtension.BeforeDeserializeServer(SoapServerMessage message)
   --- End of inner exception stack trace ---