Cannot call member function without object = C++

I am brushing up again and I am getting an error:

Cannot call member function without object.

I am calling like:

FxString text = table.GetEntry(obj->GetAlertTextID());
FxUChar outDescription1[ kCP_DEFAULT_STRING_LENGTH ];

IC_Utility::CP_StringToPString(text, &outDescription1[0] );

The line: IC_Utility::CP_StringToPString(text, &outDescription1[0] ); is getting the error

My function is:

void IC_Utility::CP_StringToPString( FxString& inString, FxUChar *outString)
{
}

I know it has to be something simple I am missing.