Problem with Linked list ()

Hi,
i'm new in c, I have a problem with a Linked list maybe you can help me
I made a linked list, and it's working fine, but i have a problem trying to access to an item using an index
This is my structure and functions (i'll put a red note where i think the error is):

Code:

typedef struct node{
        int a;
        int b;
        struct nodo *next;
}List;

//insert function:
List *insert(List **lst,    int a,     int b){
        assert(lst!=NULL);
        List *node=malloc(sizeof(List));
        node->next=*lst;
        *lst=node;
        node->a=a;
        node->b=b;
        return *lst;
}
[COLOR=Red]
[B]List **get(List **lst, int index){
        int i=0;
        while ( (*lst != NULL) && (i< index) ){
                lst=&(*lst)->next;
                i++;
        }
        if (i==index){
             return lst;
        }else{
             return NULL;
        }
}[/B][/COLOR]

//im calling the get from other function using this:
int valuea=get(&alist,10)->a;
the error i'm receiving is:
error: request for member 'a' in something not a structure or union

I'll appreciate your help!
Thank you!