Site error after installing PaceMaker

Please HELP!

received the following error on my site after installing the PaceMaker, I'm using DotNetNuke_Community_05.01.00.

Compiler Error Message: BC30002: Type 'Entities.Portals.PortalAliasController' is not defined.

Source Error:
 

Line 16:             Get
Line 17:                 If _KeepAliveUrl = "" Then
Line 18:                     Dim pc As New Entities.Portals.PortalAliasController
Line 19:                     Dim paCollec As ArrayList = pc.GetPortalAliasArrayByPortalID(-1)
Line 20:
 

Source File: D:\MCISD.NET\html\mcisddev\App_Code\Aricie.DNNPaceMaker\PaceMaker.vb    Line: 18