CG Warning

hi there,
atfer I turn the CG on I get the following Warning at the start of my
Prog:
BorlndMM.DLL has allready allocated memory, which may now be reported as
false leaks. Do you want to continue hooking the memory manager? If I
select Yes I get a AV in @dchook@_1643. By no there is no AV.
Who has hooking the MM bevor the CG?
Thanks
Michael Honnef