Calling inherited interface method (COM)"

I've got a class SALogs which is essentially a collection class, with a few extras. The a collection interface (IComCollection) is inherited. There are some methods (Add(), Count() etc) which I would like to call on the IComCollection interface.

When I call these methods, i.e.

if((Count() == 0) && (m_bGUI) && (!m_bTimerIsSet))
StartGUI();

I get the error:
H:\C++\Development\Logs\SALogs.cpp(152) : error C2065: 'Count' : undeclared identifier

if((CComCollection::Count() == 0) && (m_bGUI) && (m_bTimerIsSet))
StartGUI();

but this yields the error:

why is this? I have also tried:


H:\C++\Development\Logs\SALogs.cpp(179) : error C2955: 'CComCollection' : use of class template requires template argument list

Why?

How should I call this inherited member?
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Regards