C++ :: Thread Error - Illegal Operation On Bound Member Function Expression

CODE:

class Secure {
private:
int seconds;
bool isRUNNING;
public:
Secure(int seconds) {

[Code] .....

ERROR:

error C2276: '&' : illegal operation on bound member function expression

I read that due to explicit casting, threads cannot be created within a class. I'm trying to thread a scanning system to relieve stress on my main program/module, rather than having the scanner stunt their performance.