freeobject and proxies

hi, i'm having the trouble of max crashing whenever i unload my external,
i think it is an issue of me incorrectly attempting to free some proxies.
am i unclear on the syntax or is there something i'm overlooking? any
help would be appreciated. - dan

(also i notice that there is now a development forum, is it inappropriate
to ask these kinds of questions over the main list?)

code examples
----
here i predeclare them:

typedef struct _comb{
    t_pxobject x_obj;
    void *t_proxy[4];
    float *data;
    float *data2;
    long InletNum;
    long index;
    long index2;
    long allocsize;
    long size;
    float A;
    float B;
    float C;
    long Delay;
    long samperms;
} t_comb;

...

then i reference a free routine in main:

void main (void)
{
    setup((t_messlist**)&comb_class, (method)create_object,
(method)destroy_object, (short)sizeof(t_comb), NULL, A_DEFLONG,
A_NOTHING);

...

i declare them as inlets:

void *create_object(long maxsize)
{

    t_comb *mo = (t_comb*)newobject(comb_class);
    mo->t_proxy[3] = proxy_new(mo, 4, &mo->InletNum);
    mo->t_proxy[2] = proxy_new(mo, 3, &mo->InletNum);
    mo->t_proxy[1] = proxy_new(mo, 2, &mo->InletNum);
    mo->t_proxy[0] = proxy_new(mo, 1, &mo->InletNum);

...

and later attempt to free them:

void destroy_object(t_comb *mo)
{
    free(mo->data);
    free(mo->data2);
    freeobject(mo->t_proxy[4]);
    mo->data = mo->data2 = NULL;
    mo->allocsize = mo->size = mo->index = mo-> index2 = 0;
    dsp_free(&(mo->x_obj));
}