C++ :: Memory Corruption In Clutter Gui App?

I wrote most of a gui using clutter, using tons of global variables.

Clutter has a function which you use to connect an event or action like a mouse click to a function, and lets you pass one user data variable to it.

I wanted to eliminate globals. So I put everything in a struc to pass to each function, and after a few hours of doing all of this, I thought I almost got it working, but it's not the case.

I have this in the main

Code:
for (int i=0; i < 8; ++i )
clutter_actor_add_action(MV_CL_GUI.Actor_Wav[i], MV_CL_GUI.Wav_Action[i]);

which causes an error attempted to read or write protected memory.

When I comment that line out, the gui at least comes up, but as soon as a mouse event launches a function, the program crashes and gives a Debug Assertion Failed...click retry.

Then it points to a line in dbgdel.cpp

Code:
/* get a pointer to memory block header */
pHead = pHdr(pUserData);
/* verify block type */
_ASSERTE(_BLOCK_TYPE_IS_VALID(pHead->nBlockUse));

Here is what my struct looks like.

Code:
struct Clutter_GUI {
string ProjectName;
ClutterActor *Actor_Enter_Source_Bar;
ClutterLayoutManager *Actor_Source_Directories_Box_Layout;
int Source_Row_Selected;
ClutterAction *Action_Track_Row_Rect[12];

[code]....

Except it has about 5 times as many variables in it. And I am accessing all of the members just using object dot member syntax.

here is an example of the functions used to connect functions to events or actions.

Code:
g_signal_connect ( MV_CL_GUI.Action_Root_Row_Rect[1], "clicked", G_CALLBACK (Root_Row_1_Clicked), &MV_CL_GUI);

The last parameter is the struct I am passing to the function.and my functions look like this.

Code:
void Root_Row_1_Clicked (Clutter_GUI_Object MV_CL_GUI) {...}

But when I launch a function not with g_signal_connect, I don't use the &,

Code:
play(MV_CL_GUI)