The new version of Microsoft Office has a new security model. To use ParaPlan, you have to modify settings.
If you are using the full version of Office
Open Access 2003 from the start menu. Go to Tools->Macro->Security... (you may have to "reset" your toolbar if this menu does not show up. Tools->Customize->Toolbars Tab->Reset)
On the dialog box that opened up, select "Low", then click "OK"
If you are using the Access runtime
This is for advanced users only! If you are unsure how to correctly change your registry, call Tim at 785-550-1483.
Set or create the following registry keys:
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Jet\4.0\Engines]
"SandBoxMode"=dword:00000002
[HKEY_LOCAL_MACHINE\Software\Microsoft\Office\11.0\Access\Security]
"Level"=dword:00000001
See this blog post for more details.